Topaz in its normal state is a brilliant dark colored to yellow, a trademark which implies it is now and again mistaken for the less profitable gemstone citrine. An assortment of polluting influences and medications may influence topaz to wine red, pale dark, ruddy orange, light green, or pink (uncommon), and obscure to translucent/straightforward. The pink and red assortments originate from chromium supplanting aluminum in its crystalline structure.
Orange topaz, otherwise called valuable topaz, is the customary November birthstone, the image of kinship, and the state gemstone of the US territory of Utah.
Royal topaz is yellow, pink (uncommon, if normal) or pink-orange. Brazilian supreme topaz can frequently have a splendid yellow to profound brilliant dark colored shade, once in a while even violet. Many darker or pale topazes are dealt with to make them splendid yellow, gold, pink or violet hued. Some royal topaz stones can blur on presentation to daylight for a broadened timeframe.
Blue topaz is the state gemstone of the US territory of Texas. Normally happening blue topaz is very uncommon. Ordinarily, boring, dim or light yellow and blue material is warm treated and illuminated to create a more wanted darker blue.
Spiritualist topaz is dull topaz which has been falsely covered through a vapor statement process giving it a rainbow impact on its surface.
Albeit hard, topaz must be treated with more noteworthy care than some different minerals of comparative hardness, (for example, corundum) in view of a shortcoming of nuclear holding of the stone’s particles along some pivotal plane (while jewels, for instance, are made out of carbon iotas attached to each other with rise to quality along the greater part of its planes). This gives topaz an inclination to crack along such a plane if hit with adequate power.
Topaz has a generally low record of refraction for a gemstone, thus stones with substantial aspects or tables don’t shimmer as promptly as stones cut from minerals with higher refraction files, however quality boring topaz shines and shows more “life” than correspondingly cut quartz. At the point when given a common “splendid” cut, topaz may either demonstrate a shimmering table aspect encompassed by dead-looking crown features or a ring of shining crown features with a dull well-like table.