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Explore Q Report's Content Centre for expert advice on jewellery insurance. You can also read e-guides and blogs, watch videos and more.

Explore Q Report's Content Centre for expert advice on jewellery insurance. You can also read e-guides and blogs, watch videos and more.

Jewellery, engagement ring & watch advice, plus insurance tips & industry insights. 

Watch expert tips, discover insurance benefits & hear real customer stories. 

Find answers to common questions about jewellery, engagement ring & watch insurance. 

Click here to access important policy documents - Product Disclosure Statement, Financial Services Guide, and Policy Wording.

Click here to access the Target Market Determination (TMD) document.

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Diamond Fluorescence: What Buyers Should Know

Q Report Team

Updated on March 25, 2025
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It’s easy to assume the term ‘diamond fluorescence’ simply refers to the colour of the stone, however in reality, it’s more complicated than that. In this article, we outline why diamond fluorescence is one of the more complex and misunderstood terms you’ll encounter while engagement ring shopping.

What is Diamond Fluorescence? 

When jewellers talk about 'diamond fluorescence’, they’re referring to the colour emitted by the stone when seen under ultraviolet light. In rare cases, this light (or fluorescence) has been found to impact how the diamond appears in natural light, and can be measured on a scale outlined by the Gemological Institute of America (GIA).

The GIA outline five classifications of diamond fluorescence, which are defined by the intensity of the light emitted by the stone:

  • None
  • Faint
  • Medium
  • Strong
  • Very Strong

The GIA also measure fluorescence according to a colour grade, ranging from D to Z. Stones in the ‘D’ category are often considered ‘colourless’ and are rare. On the other end of the spectrum, ‘Z’ diamonds are seen to emit a yellow-tinged fluorescence. 

How Does Fluorescence Affect the Diamond Colour?

According to the GIA, roughly 30% of all diamonds fluoresce to some level. Most stones emit a blue fluorescence to varying degrees, but yellow, ‘white’, green and red tones have also been seen on occasion.

But remember, these colours are observed when the stone is subjected to ultraviolet light - rarely in natural settings. A 1997 study by the GIA found that trained diamond graders, trade professionals and average observers struggled to find any visual effect of fluorescence on diamonds when viewed in natural light. According to the study:

“The results revealed that strongly blue fluorescent diamonds were perceived to have a better colour appearance when viewed table-up, with no discernible trend table-down. Most observers saw no relationship between fluorescence and transparency."
So if fluorescence has a negligible effect on a diamond’s appearance in natural light, why is it important to buyers?

Diamond Fluorescence Example

How Diamond Fluorescence Affects Price

Diamond fluorescence is a murky subject, and can often be used as a marketing tool to lure unwary buyers. Some gemologists believe that diamonds with a Very Strong Blue fluorescence rating can appear hazy in natural light. Others say that diamonds with a ‘None’ fluorescent rating are highly prized; charging a high premium based on this fact alone.

It’s important to remember that fluorescence is just one of many factors that affect the price of your stone. And given the contrasting opinions of gemologists and inconclusive evidence of its effect on appearance, it’s safe to say that fluorescence isn’t worth losing sleep over.

As always, we recommend you find a trusted jeweller to work alongside when finding your perfect stone. You can find a Q Certified Jeweller in your area on this page.

Protecting Your Jewellery Investment 

As you can see, buying an engagement ring is a research-heavy process and one that involves much more than brushing up on the 4Cs (cut, colour, clarity and carat). However, finding that perfect stone is well worth the time, effort and money you invest. But protecting your investment is also well worth it when disaster strikes.

With Q Report jewellery insurance, you can enjoy your stone as it was intended - not locked away in a safe or wrapped in cotton wool. Protecting your engagement ring with specialised jewellery insurance gives you the confidence that it’s covered for damage and loss. And with Q Report, you even have the option to return to your original jeweller for replacement.

See how little it can cost you to protect the things you love - get an instant jewellery insurance quote today.

 

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Purchase Amount

To get an accurate insurance quote, please provide the amount from your purchase receipt.

Don't have the receipt?

If you don't have the receipt, you can provide the most recent valuation amount instead.

OK
Related Posts
Featured Posts
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Jewellery Insurance

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play-audio
Listen to article
/

 

 

It’s easy to assume the term ‘diamond fluorescence’ simply refers to the colour of the stone, however in reality, it’s more complicated than that. In this article, we outline why diamond fluorescence is one of the more complex and misunderstood terms you’ll encounter while engagement ring shopping.

What is Diamond Fluorescence? 

When jewellers talk about 'diamond fluorescence’, they’re referring to the colour emitted by the stone when seen under ultraviolet light. In rare cases, this light (or fluorescence) has been found to impact how the diamond appears in natural light, and can be measured on a scale outlined by the Gemological Institute of America (GIA).

The GIA outline five classifications of diamond fluorescence, which are defined by the intensity of the light emitted by the stone:

  • None
  • Faint
  • Medium
  • Strong
  • Very Strong

The GIA also measure fluorescence according to a colour grade, ranging from D to Z. Stones in the ‘D’ category are often considered ‘colourless’ and are rare. On the other end of the spectrum, ‘Z’ diamonds are seen to emit a yellow-tinged fluorescence. 

How Does Fluorescence Affect the Diamond Colour?

According to the GIA, roughly 30% of all diamonds fluoresce to some level. Most stones emit a blue fluorescence to varying degrees, but yellow, ‘white’, green and red tones have also been seen on occasion.

But remember, these colours are observed when the stone is subjected to ultraviolet light - rarely in natural settings. A 1997 study by the GIA found that trained diamond graders, trade professionals and average observers struggled to find any visual effect of fluorescence on diamonds when viewed in natural light. According to the study:

“The results revealed that strongly blue fluorescent diamonds were perceived to have a better colour appearance when viewed table-up, with no discernible trend table-down. Most observers saw no relationship between fluorescence and transparency."
So if fluorescence has a negligible effect on a diamond’s appearance in natural light, why is it important to buyers?

Diamond Fluorescence Example

How Diamond Fluorescence Affects Price

Diamond fluorescence is a murky subject, and can often be used as a marketing tool to lure unwary buyers. Some gemologists believe that diamonds with a Very Strong Blue fluorescence rating can appear hazy in natural light. Others say that diamonds with a ‘None’ fluorescent rating are highly prized; charging a high premium based on this fact alone.

It’s important to remember that fluorescence is just one of many factors that affect the price of your stone. And given the contrasting opinions of gemologists and inconclusive evidence of its effect on appearance, it’s safe to say that fluorescence isn’t worth losing sleep over.

As always, we recommend you find a trusted jeweller to work alongside when finding your perfect stone. You can find a Q Certified Jeweller in your area on this page.

Protecting Your Jewellery Investment 

As you can see, buying an engagement ring is a research-heavy process and one that involves much more than brushing up on the 4Cs (cut, colour, clarity and carat). However, finding that perfect stone is well worth the time, effort and money you invest. But protecting your investment is also well worth it when disaster strikes.

With Q Report jewellery insurance, you can enjoy your stone as it was intended - not locked away in a safe or wrapped in cotton wool. Protecting your engagement ring with specialised jewellery insurance gives you the confidence that it’s covered for damage and loss. And with Q Report, you even have the option to return to your original jeweller for replacement.

See how little it can cost you to protect the things you love - get an instant jewellery insurance quote today.

 

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Table of Contents

Introduction
Understanding the 4 Cs of Diamonds
Diamond Shapes
Choosing a Ring Style
Selecting a Ring Retailer

Understanding Mechanical Movements

Rolex-super-precision

Unlike their battery-powered quartz counterparts, luxury watches have a beating heart – the mechanical movement. First created in the 14th century, large, weight-driven tower clocks with verge escapements and foliot balances marked the dawn of mechanical timekeeping.

Today, the core concept of mechanical movements remains unchanged from its original conception. It involves an intricate arrangement of gears, springs, and an escapement powered by a wound mainspring. This precision engineering allows for smooth operation and precise timekeeping.

Manual watch movements require the wearer to wind the crown periodically. Automatic watch movements, on the other hand, utilise the wearer's movements to keep the mainspring wound, offering a convenient everyday solution.

The Patek Philippe Calatrava, with its ultra-thin manual movement, exemplifies the elegance of traditional watchmaking. On the other hand, the Rolex Oyster Perpetual, with its self-winding mechanism epitomises practicality and durability.

Whether manual or automatic, a mechanical movement imbues a luxury watch with a soul, a testament to human ingenuity and a treasured heirloom for generations to come

Luxury Watch Complications: Exploring Hidden Features & Functionality

Luxury watches often boast 'complications,' intricate mechanisms that add layers of sophistication, style and utility. Here, we explore some of the most fascinating complications created by the best luxury watch brands.

Statistic Heading

Rolex-super-precision

Unlike their battery-powered quartz counterparts, luxury watches have a beating heart – the mechanical movement. First created in the 14th century, large, weight-driven tower clocks with verge escapements and foliot balances marked the dawn of mechanical timekeeping.

Today, the core concept of mechanical movements remains unchanged from its original conception. It involves an intricate arrangement of gears, springs, and an escapement powered by a wound mainspring. This precision engineering allows for smooth operation and precise timekeeping.

Manual watch movements require the wearer to wind the crown periodically. Automatic watch movements, on the other hand, utilise the wearer's movements to keep the mainspring wound, offering a convenient everyday solution.

The Patek Philippe Calatrava, with its ultra-thin manual movement, exemplifies the elegance of traditional watchmaking. On the other hand, the Rolex Oyster Perpetual, with its self-winding mechanism epitomises practicality and durability.

Whether manual or automatic, a mechanical movement imbues a luxury watch with a soul, a testament to human ingenuity and a treasured heirloom for generations to come

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

Common Diamond Alternatives
for Engagement Rings

Tanzanite

Contents insurance is essential for anyone who owns valuable items, as it helps protect you should a potential loss occur in your.

Aquamarine

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Sapphire

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Luxury Watch Complications: Exploring Hidden Features & Functionality

Luxury watches often boast 'complications,' intricate mechanisms that add layers of sophistication, style and utility. Here, we explore some of the most fascinating complications created by the best luxury watch brands.

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

Peace of Mind: An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

“Knowing your engagement ring is insured brings peace of mind. Accidents can happen, and insurance coverage alleviates the worry and stress of potential loss or damage.”

Unlike their battery-powered quartz counterparts, luxury watches have a beating heart – the mechanical movement. First created in the 14th century, large, weight-driven tower clocks with verge escapements and foliot balances marked the dawn of mechanical timekeeping.

Today, the core concept of mechanical movements remains unchanged from its original conception. It involves an intricate arrangement of gears, springs, and an escapement powered by a wound mainspring. This precision engineering allows for smooth operation and precise timekeeping.

Manual watch movements require the wearer to wind the crown periodically. Automatic watch movements, on the other hand, utilise the wearer's movements to keep the mainspring wound, offering a convenient everyday solution.

The Patek Philippe Calatrava, with its ultra-thin manual movement, exemplifies the elegance of traditional watchmaking. On the other hand, the Rolex Oyster Perpetual, with its self-winding mechanism epitomises practicality and durability.

Whether manual or automatic, a mechanical movement imbues a luxury watch with a soul, a testament to human ingenuity and a treasured heirloom for generations to come

Export
Expert Tip

Budget Considerations

Diamond shapes can vary in price due to popularity and demand. Round brilliants, for example, tend to be more expensive than other shapes due to their high demand. If budget is a concern, consider alternative shapes or prioritise other aspects, such as cut quality, over the shape itself.

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Jewellery Insurance FAQ

Contents insurance covers the items within your home in case they are damaged, lost or stolen. This can include furniture, electronics, clothing and other personal.  Contents insurance is essential for anyone who owns valuable items, as it helps protect you should a potential loss occur in your.

Contents insurance covers the items within your home in case they are damaged, lost or stolen. This can include furniture, electronics, clothing and other personal.  Contents insurance is essential for anyone who owns valuable items, as it helps protect you should a potential loss occur in your.
Home Security Fortification

An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

An engagement ring is a significant financial and sentimental investment. Specialised.

Travel Savvy

An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

An engagement ring is a significant financial and sentimental investment. Specialised.

Social Media Caution

An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

An engagement ring is a significant financial and sentimental investment. Specialised.

Regular Valuations

An engagement ring is a significant financial and sentimental investment. Specialised engagement ring insurance provides financial protection in the event of loss, theft or damage by ensuring you can recover the ring's monetary value or repair or replace.

An engagement ring is a significant financial and sentimental investment. Specialised.

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Contents insurance is essential for anyone who owns valuable items, as it helps protect you should a potential loss occur in your.

Luxury Watch Complications: Exploring Hidden Features & Functionality

Luxury watches often boast 'complications,' intricate mechanisms that add layers of sophistication, style and utility. Here, we explore some of the most fascinating complications created by the best luxury watch brands.

Home Security Fortification

Contents insurance covers the items within your home in case they are damaged, lost or stolen. This can include furniture, electronics, clothing and other personal.  Contents insurance is essential for anyone who owns valuable items, as it helps protect you should a potential loss occur in your.

Purchase Amount

To get an accurate insurance quote, please provide the amount from your purchase receipt.

Don't have the receipt?

If you don't have the receipt, you can provide the most recent valuation amount instead.

OK

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