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Other varieties of color-changing garnets exist. In daylight, their color ranges from shades of green, beige, brown, gray, and blue, but in incandescent light, they appear a reddish or purplish/pink color. [25] This is the rarest type of garnet. Because of its color-changing quality, this kind of garnet resembles alexandrite. [26]
Demantoid is the green gemstone variety of the mineral andradite, a member of the garnet group of minerals. Andradite is a calcium- and iron-rich garnet. The chemical formula is Ca 3 Fe 2 (SiO 4) 3 with chromium substitution as the cause of the demantoid green color. Ferric iron is the cause of the yellow in the stone.
Tsavorite or tsavolite is a variety of the garnet group species grossular, a calcium-aluminium garnet with the formula Ca 3 Al 2 Si 3 O 12. [2] Trace amounts of vanadium or chromium provide the green color.
The colors from different rhodolite sources may vary from a lavender pink to raspberry rose or raspberry red and from purplish-violet (grape) to purplish red. [ 5 ] The color of rhodolites, combined with their brilliance, durability, and the accessibility of stones with no visible inclusions have brought about some demand for the stone in the ...
In South American folklore, the carbuncle is a small elusive animal containing a mirror, shining gemstone or riches like gold. [4] [5] The description of the carbuncle vary, some saying it looks like a firefly in the night, or like having a bivalve-like shell and maize ear shape. [4]
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What does Nizza DOCG wine taste like? Nizza DOCG wines are powerful, complex, full-bodied expressions of the Barbera grape. In the glass, they typically have an intense ruby-red color, shifting ...
Pyrope garnet in eclogite - Shibino, Ural Mountains, Russia. The mineral pyrope is a member of the garnet group. Pyrope is the only member of the garnet family to always display red colouration in natural samples, and it is from this characteristic that it gets its name: from the Greek words for fire and eye.
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