With our headquarters situated in London, DDA Group is involved in every stage of diamond trading.
Our offices in London, Cape Town, Antwerp, Dubai, Hong Kong and Shanghai, oversee every step of the diamond journey. This includes, investment in diamond exploration and mining around the world, diamond buying operations in several countries, rough diamond auctions, cutting and polishing, financing diamond trade, sales of polished diamonds, design, production and sales of our fine jewellery collection, Iris Alexander.
Iris Alexander’s collections feature exquisite, collectable, one of a kind pieces, conceived with sensitivity to the composition and form of a woman. The essence of femininity is conveyed within each design – varying in its interpretation, yet demonstrating the multi-faceted power and personalities of the women who wear them.
Our worldwide investments ensure our presence within every stage of the diamonds journey – from Earth to Elegance. But where does the journey start?
Around 4-6 billion years ago, diamonds were formed 150 – 200km below the earth’s surface in the earth’s mantle and brought to the surface by deep-source volcanic eruptions. These eruptions produced kimberlite and lamproite pipes some of which are known to contain diamonds and are sought after by diamond prospectors. Over millions of years, some of the kimberlite or lamproite pipes that reached the earth’s surface became weathered and eroded from these eruptive deposits. The diamonds contained within the pipes became displaced and were deposited further away from the source and can now be found along ancient river beds, streams or the ocean.
Diamonds were first discovered in India in the 1400s when Indian diamonds were sold in Venice and other European trade centres. Around 300 years later, India’s diamond supplies declined, and Brazil became the world’s major source of diamonds, until 1867 when a huge diamond reserve was discovered in Kimberley, South Africa. The countries that have been the main sources of rough diamonds has changed over time.