MINERAL GEM WORLD

TWINNED SAPPHIRE ROUGH CRYSTALS PARCEL

This is a parcel of natural untreated specimens from Sri lanka-They are showing two or more crystal formations-great collectors piece..

Twinned Crystals: Crystals of many minerals grow in fixed relationships known as Twins. When two or more crystals grow together symmetrically, in other words, they share some crystallographic direction or plane, but other parts are in a reversed orientation they are called twins.

Sapphire is one of the two gem varieties of the species corundum. Although blue is the best known hue, the gem occurs in virtually every spectral hue excepting red. Red corundum is a ruby. Sapphire may also be colorless, and it also occurs in the non-spectral shades, gray and black. Yellow and green sapphires have traces of iron that gives them their color. Pink sapphires have a trace of the element chromium and the deeper the color pink the higher their monetary value as long as the color is going toward the red of rubies. Sapphires also occur in shades of orange and brown, and colorless sapphires are sometimes used as diamond substitutes in jewelry. Salmon-color padparadscha sapphires often fetch higher prices than many of even the finest blue sapphires.