This article is about the mineral. For the gemstone, see Diamond (gemstone). For other uses, including the shape ◊, see Diamond (disambiguation).
Featured article
Diamond
Seven clear faceted gems, six small stones of similar size and a large one.
A scattering of round-brilliant cut diamonds shows off the many reflecting facets.
General
Category Native Minerals
Chemical formula C
Identification
Molar mass 12.01 g·mol-1
Color Typically yellow, brown or gray to colorless. Less often blue, green, black, translucent white, pink, violet, orange, purple and red.
Crystal habit Octahedral
Crystal system Isometric-Hexoctahedral (Cubic)
Cleavage 111 (perfect in four directions)
Fracture Conchoidal (shell-like)
Mohs scale hardness 10
Luster Adamantine
Streak Colorless
Diaphaneity Transparent to subtransparent to translucent
Specific gravity 3.52±0.01
Density 3.5–3.53 g/cm3
Polish luster Adamantine
Optical properties Isotropic
Refractive index 2.418 (at 500 nm)
Birefringence None
Pleochroism None
Dispersion 0.044
Melting point Pressure dependent
References [1][2]
In mineralogy, diamond (from the ancient Greek αδάμας – adámas "unbreakable") is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions. Diamond is renowned as a material with superlative physical qualities, most of which originate from the strong covalent bonding between its atoms. In particular, diamond has the highest hardness and thermal conductivity of any bulk material. Those properties determine the major industrial application of diamond in cutting and polishing tools.
Create a radiant aura. Choose from an extensive selection of studs, hoops and fashion earrings that are always the perfect indulgence.
Add another facet of brilliant flair with earrings that accessorize with incredible shine and spectacular style.
18k Yellow Gold Diamond Earrings 1.49tcw
Watch her face light up when you give her these exquiste diamond earrings. These earrings feature a total of eight round brilliant diamonds of exceptional quality set in 18k yellow gold with screwback closure for extra security.
DiamondsonWeb offers exquisite diamonds at exceptional prices. Shop for loose diamonds using our helpful online guide; create your own ring; and browse through our Signature Collection™ for special offers on the highest quality cut diamonds.
Diamonds on Web makes it easy to find the perfect pair of diamond earrings. You can create your own studs earrings by choosing from our extensive diamond inventory or choose from our many pre-set options.
Make your precious moments truly unforgettable with our perfect diamond engagement rings. Browse through a variety of diamond engagement rings, settings and styles; read the Diamonds on Web Simple Guide for the Smart diamond engagement ring Shopper and select the perfect diamond engagement ring for your special occasion
Our expertly crafted diamond bracelets are the perfect gift for any occasion. Whether you prefer classic diamond tennis bracelets or the latest contemporary styles, Diamonds on Web has something for you.
