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Blog posts of '2018' 'September'

Terminology
Terminology

 

There is no generally accepted definition for the term gem or gemstone, but they all have something special, something beautiful about them. Most gemstones are minerals (e.g., diamond), mineral aggregates (such as lapis lazuli) or rocks (such as onyxmarble). Some are organic formations (e.g., amber), and other gem materials are of synthetic origin (e.g., YAG).

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‌Blue Sapphire
‌Blue Sapphire

 

The name Sapphire (Greek-Blue) used to be applied to various stones. In antiquity and as late as the Middle Ages, the name sapphire was understood to mean what is today described as lapis lazuli. Around 1800 it was recognized that sapphire and ruby are gem varieties of corundum. At first only the blue variety was called sapphire, and corundums of other colors (with the exception of red) were given special, misleading names, such as "Oriental Peridot" for the green variety or "Oriental Topaz" for the yellow type.

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