GIA-Certified · Entirely Tax-Free · Visit Our Waterfront Showroom in George Town
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Diamonds

The Stone at the Centre of It All

Loose GIA-certified diamonds in every shape, chosen for brilliance, certified for certainty, and offered entirely tax-free.

The Collection

Certified Brilliance, Honestly Explained

Every significant diamond at IDC Cayman is independently graded by the Gemological Institute of America, the world’s most respected diamond authority. We keep a curated inventory of loose certified stones, and we will happily source a specific diamond to your exact brief.

You do not need to master the 4Cs before you visit, that is our job. We will show you, diamond in hand, exactly where your budget is best spent so your stone looks its most beautiful for the value.

The Collection

Diamonds & Diamond Jewellery

Certified loose diamonds, studs and pendants from our George Town boutique. View any piece in detail or enquire.

Fancy Yellow Diamond Teardrop Pendant

Fancy Yellow Diamond Teardrop Pendant

Pendants
Fancy Yellow Diamond Round Cluster Pendant

Fancy Yellow Diamond Round Cluster Pendant

Pendants
Fancy Yellow Diamond Cluster Pendant

Fancy Yellow Diamond Cluster Pendant

Pendants
Fancy Yellow Diamond Round Cluster Pendant

Fancy Yellow Diamond Round Cluster Pendant

Pendants
Fancy Yellow Diamond Cushion Pendant

Fancy Yellow Diamond Cushion Pendant

Pendants
Pink Diamond Round Pendant

Pink Diamond Round Pendant

Pendants
Pink Diamond Pear Pendant

Pink Diamond Pear Pendant

Pendants
Fancy Yellow Diamond Oval Pendant

Fancy Yellow Diamond Oval Pendant

Pendants
Pink Diamond Radiant Pendant

Pink Diamond Radiant Pendant

Pendants
Pink Diamond Cushion Pendant

Pink Diamond Cushion Pendant

Pendants
Diamond Vintage Pendant

Diamond Vintage Pendant

Pendants
Pink Diamond Round Pendant

Pink Diamond Round Pendant

Pendants
View the Full Shop
Choosing Your Diamond

The 4Cs, Made Simple

Cut

The most important C. Cut governs how powerfully a diamond returns light as fire and sparkle, a superb cut outshines a higher grade poorly cut.

Colour

How close a white diamond comes to truly colourless, graded D (colourless) to Z. G-H offers a beautiful white at exceptional value.

Clarity

The natural inclusions within a diamond, from Flawless to Included. VS1-VS2 are eye-clean and represent outstanding value.

Carat

The weight of the diamond. Shape and cut affect how large a stone looks, an oval can look larger than a round of equal carat.

Find Your Shape

Diamond Shapes

Round Brilliant

The most brilliant and popular shape, maximum sparkle, suits every setting.

Oval

Elongating and fashionable; looks larger than its carat weight.

Cushion

A soft square outline with romantic, vintage-inspired faceting.

Emerald Cut

Architectural step-cut facets for understated, sophisticated clarity.

Pear

A distinctive, directional teardrop, striking as a solitaire or pendant.

Princess

A clean, contemporary square brilliant with sharp corners and high sparkle.

GIA Certification

Why a GIA Report Matters

A GIA diamond grading report is an unbiased, scientifically precise assessment from gemologists with no stake in the sale. It is the difference between trusting a description and knowing the truth, and at IDC Cayman it is non-negotiable for every significant diamond.

Questions

Good to Know

What does GIA certification mean?
The Gemological Institute of America is the world's foremost independent diamond grading laboratory and the originator of the 4Cs. A GIA certificate is an unbiased, scientifically precise report, issued by trained gemologists with no commercial interest in the sale, confirming a diamond's cut, colour, clarity and carat weight. When a diamond carries a GIA report, you know exactly what you are buying.
Why does IDC Cayman insist on GIA-certified diamonds?
Because certification protects the buyer. Every significant diamond we sell is independently GIA-graded rather than assessed in-house, removing any risk of misrepresentation. We review the certificate with you and explain each grade in plain language before you commit.
Which of the 4Cs matters most?
Cut. A well-cut diamond returns more light and sparkles more than a poorly cut stone of higher colour or clarity. After cut, we help most clients prioritise a G-H colour and VS1-VS2 clarity, which look beautiful to the eye while offering excellent value.
Can I buy a loose diamond and choose a setting separately?
Yes. We maintain an inventory of GIA-certified loose diamonds in all major shapes and a wide range of carat weights, colours and clarities. A loose diamond can be paired with a setting from the collection or incorporated into a bespoke design.
How much can I save buying diamonds in Grand Cayman?
The Cayman Islands charges zero sales tax and zero VAT on diamonds. UK and European buyers save the equivalent of 20%+ VAT, Australians 10% GST, and Americans the equivalent of their state sales tax, realised at purchase, with no refund paperwork.
What diamond shapes do you carry?
Round brilliant, oval, cushion, princess, pear, marquise, emerald, radiant and asscher, across a wide range of carat weights, colours and clarities. If we do not have a specific stone in stock, we can source it to your exact specification.
Select Your Stone

Find Your Diamond

Visit us in George Town and we will guide you, stone in hand, to the diamond that is right for you.

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