Heliotrope

Heliotrope . Its name, this mineral has received from the Greek word helios - the sun and the trope-turn, other names: Stefanova stone, bloody jasper east. It has dark green with reddish stains. Stone has been known since the ancient Egyptians and one of the papyri is praised in these words:"The world is no more powerful thing, if a person has i...

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    Quartz (rock crystal)

    Quartz . The name of this crystal is derived from the German word"quarz", whose value is unclear. Pure, containing no impurities of quartz is transparent and colorless as a glass. Represents the silica - SiO2 with possi...