Gemstones

Gemstones

Contributors in Gemstones

Gemstones

This effect resembles luster, and is caused by light reflection from inclusions or texture inside the gem. Luster is light reflected from the surface of the gem and sheen is reflection from inside ...

side stone

Fashion; General jewelry

Side stones are set around or beside the center stone in a jewelry setting.

single cut

Fashion; General jewelry

Stones with seventeen facets or fewer.

single refraction

Fashion; General jewelry

Most gemstones are doubly refractive -- they have 2 refractive indices. Only a few gemstones have a single refractive index, specifically diamond, spinel and garnet. See also Birefringence.

solitaire

Fashion; General jewelry

A solitaire, often found in rings and pendants, is a single stone in a simple setting. Compare Center Stone and Side Stone.

species

Fashion; General jewelry

The term used to designate a family of gemstones. For example, corundum is a species that contains the varieties sapphire and ruby. The Quartz family contains amethyst, citrine, and chalcedony, to ...

corundum

Fashion; General jewelry

A crystalline form of aluminum oxide known in the gemstone world as ruby and sapphire. It is naturally clear, but can have different colors when impurities are present. Corundum is much admired for ...