Vp Gems & Jewellery

Diamonds color, clarity and cut grade scale measurements.

Diamond

Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. At room temperature and pressure, another solid form of carbon known as graphite is the chemically stable form of carbon, but diamond converts to it extremely slowly. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth.Diamond

The slightly misshapen octahedral shape of this rough diamond crystal in matrix is typical of the mineral. Its lustrous faces also indicate that this crystal is from a primary deposit.GeneralCategoryNative minerals Formula
(repeating unit)C IMA symbolDia^[1]Strunz classification1.CB.10aDana classification1.3.6.1Crystal system Cubic Crystal classHexoctahedral (m3m)
H-M symbol: (4/m 3 2/m)Space groupFd3m (No. 227)StructureJmol (3D)Interactive imageIdentificationFormula mass12.01 g/molColorTypically yellow, brown, or gray to colorless. Less often blue, green, black, translucent white, pink, violet, orange, purple, and red.Crystal habit Octahedral TwinningSpinel law common (yielding “macle”)Cleavage111 (perfect in four directions)FractureIrregular/UnevenMohs scale hardness10 (defining mineral)Luster Adamantine StreakColorlessDiaphaneity Transparent to subtransparent to translucentSpecific gravity3.52±0.01Density3.5–3.53 g/cm ³ 3500–3530 kg/m ³Polish lusterAdamantineOptical propertiesIsotropicRefractive index2.418 (at 500 nm)BirefringenceNonePleochroismNoneDispersion0.044Melting point Pressure dependent

Natural Diamonds

Only Natural Diamonds, brought to you by the Natural Diamond Council, is the definitive destination for all things natural diamonds. We provide inspiration, insights and information on the world of real, natural diamonds recovered from the earth, including a behind-the-scenes look into the natural diamond industry, as well as the latest trends in diamond jewelry design to education and tips about how to buy the perfect engagement ring and other diamond jewelry.

pieces with Lupita’s gold fringe Prada gown. I loved how the fringe ring from the Alchemist of Light collection could not be more perfect because it mimicked the detailing of the dress,” Lupita Nyong’o’s stylist Micaela Erlanger told Only Natural Diamonds in an exclusive statement about the look.

Erlanger added “the earrings and other statement rings from the Reflections of Nature collection looked like the light has been reflected and refracted. You don’t ever want your jewellery to compete, rather you want them to enhance each other. These pieces effortlessly did just that.”