Feeling blue? An Oppenheimer Blue diamond of 14.62 carats.
Some diamonds come from depths of more than 650km. Tiny imperfections in these gems give us clues about what's happening in Earth's hidden geological layers.
Diamond or zirconia? Apart from the price, it can be hard to tell these two gems apart.
Zirconia is a mineral with a crystal structure made from the elements zirconium and oxygen. It looks pretty like diamond, but is only worth a fraction of the value.
The first three Natural History Museum painites – including one in its natural state with rubies that had been sitting in their collection for years. It had initially been misidentified as the much less valuable tourmaline.
© The Trustees of the Natural History Museum, London
What makes a stone a gem? It boils down to a few key qualities: beauty and durability. But opal, the national gemstone of Australia, is an anomaly - it's soft.
The world's biggest diamond company is to sell synthetic gemstones for the first time.
Diamonds are a data storers’ best friend?
Diamond image via www.shutterstock.com
With current modes up against their limits, we need new data storage solutions. Tiny defects in diamonds' atomic structure might turn them into a new medium for memory.
Zimbabwe needs more responsible diamond mining companies, not fly-by-night operators.
Zimbabwe has said it will take over all diamond mining operations in the country. But what is needed to maximise revenues isn't state ownership, but improvements in existing regulatory practices.
A new "world's hardest material" is proclaimed every few years – but taking the top spot from diamond isn't easy.
A speck of gold from a mine in Liberia, Africa.
Shopping for a gold ring? New guidelines seek to be the rough equivalent of Fair Trade for small-scale gold mining.
Diamond geezers. Indians are taking Antwerp.
From the outside, Number 2 Hoveniersstraat Street in Antwerp is a nondescript office block. Only the clusters of businessmen speaking in Gujarati on their mobile phones or with each other, give any indication…
A new discover in the field of quantum electronics could lead to a dramatic improvement of computing speeds, data storage…
Kimberlite, a volcanic rock which is best known as a major host of diamonds, has been discovered for the first time in Antarctica…
Diamond: more useful in the lab than on a finger.
Diamond is well known for its appeal as a gemstone. Perhaps less well known are some of its extreme material properties. As well as being the hardest material in nature, diamond is very good at conducting…
Diamonds from 700 kilometres below the earth’s surface show the carbon cycle extends deep into the planet’s interior. The…