The april birthstone: diamond

Precious stone, generally colorless, made of pure crystallized carbon, of very high hardness and refractive index. The word diamond comes from the Greek word “adamas” meaning unconquerable or invincible.

The adjective "adamas" was employed to describe the hardest substance known and became synonymous with the gem, in reference to the hardness of this stone made of carbon, a chemical element fundamental to all life, here in its most concentrated form.

It will always be the oldest item that anyone can own, from 50 million years old for the most recent deposits to 2.5 billion years for the oldest. Formed more than 100 miles below the surface of the Earth and shot to the surface by volcanoes, it is also a strategic and high-tech material. Diamonds were first discovered in India, probably around 800 B.C. Until 1725, India’s market city of the diamond trade, Golconda, was fabled to be the source of these gems. In fact, these diamonds were mined in the surroundings of this city. Smaller quantities also came from Kalimantan (Borneo).

The primary volcanic source of these gems was never discovered during the almost 2500 years in which the Indian sub-continent was the only producer of diamonds. These alluvial deposits were rich enough to supply the world until the eighteenth century. A diamond-cutter’s guild was established in Antwerp., helping this city flourish as a diamond center with vast supply of rough arriving from Lisbon as well as from Venice, and later from London, as the English fortified their interest in India in the late 1600’s. Today, this city handles more than 80% of the world’s rough diamonds, as well as half of its polished diamonds, continuing thus a tradition of over 500 years of cutting and trading. South Africa's alluvial diamond deposits were discovered near the Orange River. Further exploration in the Kimberley region revealed for the first time volcanic formations called "pipes" filled with an unknown type of rock that contained diamonds. This rock, a variety of peridotite, was named "Kimberlite" after the region of its first discovery, was recognized as the diamond’s source. Only Western Australian diamonds have a different source, which is a closely related rock type, lamproite. Nevertheless, on the world market the South African diamond output is today rivaled by exploitation of the major deposits that were found in Australia, today the world’s main producer with an output average of over 25 millions carats annually, approximately 25 % of annual world production.

The price of a diamond is determined by four main factors, forming what is called call the 4 C’s: Carat weight, Clarity, Color and Cut.

Diamond exists in a large variety of colors. The rarest are red, pink and blue....Colored diamonds are called "Francy diamonds".

Nevertheless, always bare in mind that all stones are fragile! even the diamond ....

Diamond can be mounted in ring, earrings or pendant.

See my creations that combine diamond and gold, such as rings, earrings or pendant.

About the author

Julie Cailleux Mialet, Designer & Gemmologist, has revisited the Gemstone Universe with her High Standard Collection of Necklace, Rings and Earrings by cleverly mixing Pearls, Rough Rocks, Fine or Precious Gems. By her expertise, professionalism, dynamism but also by her Stonecutters and Brokers contacts through the world; Julie will be able to advise you in regards to Gemstone. Gemmology is her passion which allow her to introduce, to her customers, gems that are not well know on the French Market. Ladies that loves gems and jewels loves her creations. Her Necklaces, Rings or Earrings are suited to all type of fabrics, seasons and moods. Her creations are realised in her Paris’ Studio and respect the norm of ‘La Joaillerie Française’ With large variety of prices, quality product, designer style, personalised advise and a sales point at the Paris’ Village Suisse; Les Pierres de Julie is a must go places to find a jewel or unique piece to offer.