Fancy-shape diamonds · Coloured gemstones · Made by ITG

The art of exceptional stones

Fancy-shape diamonds and certified coloured gemstones, crafted by ITG for the world's finest jewellers.

Explore the collectionsBecome a retailer
Scroll

Made by ITG since 1967

Three generations of jewellers, one obsession: fancy-shape diamonds and rare coloured gemstones, matched stone by stone and set by hand for the world's finest jewellers.

Our story

The collections

Five ways of light

Astra AstraFlowers of light, drawn in marquise-cut diamonds.Discover Multicut MulticutLight, engineered. A cut that multiplies every reflection.Discover Emerald-cut Emerald-cutClean lines, deep light.Discover Timeless TimelessThe pieces that never ask to be replaced.Discover High Jewellery High JewelleryOne of a kind.Discover

Selected pieces

1 10

Bespoke & private label

Your design, our craftsmanship

From the first sketch to the finished, certified piece, every stage is carried out in our own atelier, with the discretion that private-label work requires.

Discover our production

Meet us

  • VicenzaOro

    15th – 19th January 2027
    Vicenza, Italy
    Hall 7 · Booth 260

  • Inhorgenta

    19th – 22nd February 2027
    Munich, Germany
    Hall B1 · Booth 117

  • Jewellery Geneva

    Dates coming soon
    Hotel President Wilson, Geneva
    Booth L3

Our expertise

Fancy shapes, rare colours

From fancy-shape diamonds to the rarest coloured gemstones, every stone we set is selected by our experts and, for the most important pieces, certified by the leading Swiss gemmological laboratories.

01

Fancy-shapeDiamonds

Marquise, pear, oval, emerald-cut, cushion and heart: we select and match shaped diamonds stone by stone, for perfect symmetry and light.

02

ColouredGemstones

Sapphires, rubies and emeralds of exceptional colour and purity, chosen one by one for intensity, origin and character.

03

IndependentCertification

Our important stones are accompanied by reports from the world's most respected gemmological laboratories, the reference for the high jewellery trade.

Our important stones are certified by

  • GRSGemResearch Swisslab
  • C. DunaigreGemmological Laboratory
  • GübelinGem Lab
  • SSEFSwiss Gemmological Institute