Amethyst is a purple variety of quartz sio 2 and owes its violet color to irradiation impurities of iron and in some cases other transition metals and the presence of other trace elements which result in complex crystal lattice substitutions.
Light purple crystal rock.
It is rarely seen as a tumbled stone.
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Various impurities are responsible for the extensive range of colors.
Hue and tone.
Jet is an organic rock similar to coal but instead of breaking like coal it can be cut carved or polished into interesting sculptures beads or faceted stones.
To properly identify your blue violet or purple mineral you first need to inspect it in a good light.
Pegmatites composed primarily of large crystals such as granite.
While most popular in yellow and blue topaz also occurs as purple stones.
Low silica feldspathoid bearing igneous rocks.
Amethyst amethyst the purple variety is the most popular and valuable quartz gemstone.
Purple crystals are naturally the birthstones of people born in the new year or just after the winter solstice which is anywhere between the last week of december until the end of january.
Jet is a very light weight material and was popular in jewelry of the victorian era.
Pure quartz which is also known as rock crystal is colorless.
Oxidized zones of ore bodies like copper.
Amethyst ranges from light to dark purple.
The hardness of the mineral is the same as quartz thus making it suitable for use in jewelry.
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Certain metamorphic rocks such as marble.
The main crystalline quartz varieties used as gemstones are described below.
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A pinkish purple crystal of topaz source.