Exceptional Diamonds & Gemstones

Every exceptional piece begins with an exceptional stone.
The Stone Library is a curated selection of remarkable gemstones sourced, studied or made available through the house. It is not an inventory, but a reflection of the calibre, character and individuality of the stones we seek.
Some gemstones shown are currently available for commission, while others have already found their home. For clients seeking something particular, de Courcier draws upon a trusted network of specialist dealers and suppliers to source rare and exceptional stones, with careful consideration given to provenance, quality and character.
This includes natural coloured diamonds of exceptional provenance — from Argyle pink and blue diamonds to rare yellow and champagne diamonds — alongside distinctive sapphires, emeralds, rubies and spinel.
Book a Private Appointment to view stones currently available through the house, or to discuss sourcing a particular diamond or gemstone for a private commission.
Why we chose this:
An exceptionally bright yellow for its grade this extremely elongated cut was what made up fall in love with this beautifully radiant diamond.
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Pear 1.00ct Fancy Light Yellow VS2 Diamond GIA Measurements 8.95 x 4.91 x 3.22 UNDER DESIGN |
![]() Why we chose this:
the rare nude peachy tone and exceptional cut creates a substantial presence for this 2ct stone
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Pear 2.00ct Fancy Peach Champagne FLYB SI2 Diamond GIA Measurements 10.94 x 7.18 x 3.63 AVAILABLE |
![]() Why we chose this:
an exception set of Zambian emeralds, renowned for their rich saturation and strong colour and excellent clarity for an emerald.
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Emerald - Zambia 2.177ct Emerald Cut 4pcs Measurements 6.00 x 4.10 x 3.00 mm |

