Certified Diamonds

Exclusively certified gemstones ranging between 0.30ct and 2.99ct.

Supporting Your Craft with Precision and Care

At Taché, we aspire to be our customers’ servicing partner of choice. Our team assists in streamlining the diamond purchasing process, taking the weight off our clients’ administrative workload to leave our customers free to excel at what they do best: creating exquisite jewellery pieces.

The Certified Diamonds Department mainly focuses on providing diamonds for timeless jewellery pieces such as tennis bracelets and eternity rings that never go out of style.

As we manufacture our diamonds in-house, Taché is able to polish gemstones to the exact requested dimensions and symmetry needs while guaranteeing full traceability. For certified diamonds between 0.50 and 2.90 carats, this in-house polishing takes place at our facility in Gaborone, Botswana.

Certified Diamond Specifications

Expertly sourced and GIA-certified white diamonds selected for their outstanding standards in quality, cut, and consistency. Ideal for solitaires, layouts and classic jewellery pieces like eternity rings, tennis bracelets and necklaces.

Certification – GIA Only

All diamonds in this department are certified exclusively by the Gemological Institute of America (GIA), ensuring global recognition, reliability and traceability.

Size Range & Shapes

From 0.30ct to 2.99ct

This category features diamonds primarily used to:

  • Create full jewellery layouts (e.g. rivière design necklaces)
  • Match side stones with a central Exceptional diamond
  • Compose eternity rings, tennis bracelets and other classic sets

 

All shapes are selected and proportioned for optimal brilliance and harmonious layout design.

  • Round Brilliant
  • Pear
  • Cushion
  • Oval
  • Emerald
  • Square Emerald

Colour & Clarity Grading

Colour Grading – Certified white diamonds, sorted for a cohesive appearance and brilliance in high jewellery settings.

Grade Appearance
D-F Colourless
G-J Near-colourless
K-L Faint tint

 

Clarity Grading – All diamonds are assessed for internal purity, with a strict range tailored for high-end use.

Grade Description
FL – IF Flawless to Internally Flawless
VVS1 – VVS2 Very Very Slightly Included
VS1 – VS2 Very Slightly Included

Fluorescence Levels

None  Faint  Medium  Strong

All diamonds are tested under UV light. Fluorescence information is clearly listed on each GIA certificate.

Custom Requests

Looking to create a layout, match stones or build a bespoke piece?

Our Certified Department would be happy to create the custom piece of your dreams.

All diamonds are responsibly sourced and comply with international ethical standards.

Buy Your Certified Diamonds

Make use of our online platform to facilitate your purchases.

Certified Diamonds

Discover our online inventory.

Do you have any more questions or would you like to receive a quote?

Do not hesitate to contact us.