The hardness of the mineral is the same as quartz thus making it suitable for use in jewelry. Chalcedony is compact and has no cleavages. A rare mineral the color changing gemstone is the most valuable of purple gemstones next to diamond with prices of up to 45 000 per carat. Fluorite is a fairly common mineral known for its huge variety of colors. Kunzite is a gemstone with a special shine.
You can see a linear shine when you expose it to light. Kunzite also exhibits pleochroism which refers to the stone s ability to display two distinct color shades when viewed from different angles. Composed of magnesium aluminum oxide spinel comes in many colors and has incredible brilliance hardness eight on the mohs scale and luster. Diaspore is a recent find in turkey that displays a more subtle color change from a light green or golden in natural light to a pinkish brown in low light. Visible light causes fluorescence too and the new light given off by the stone also is in the visible spectrum although it is of a longer wavelength.
This shine is called chatoyancy. You can enjoy a fantastic shine with this gemstone. An interesting fact about spinel is it is often mistaken for precious ruby or sapphire. But there is a rare color change fluorite from brazil that changes color from a topaz like blue in natural light to an amethyst like purple in incandescent light. 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.
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The high quality ones have high transparency and they look beautiful. The colors that are available include pink dark pink light pink yellow black blue red orange and purple pink. The color of kunzite is like a mixed color of purple and pink. Purple chalcedony has nice shades of purple ranging from light lilac to dark purple. Generally this is pink purple and colorless.While some kunzite stones are polished smooth when used in jewelry faceting is quite common to bring out the stone s brilliance. Alexandrite is a color changing gemstone from the mineral chrysoberyl. For example the strongest red fluorescence of ruby or synthetic ruby is excited by a wavelength of approximately 5100 angstrom units one angstrom unit one ten millionth of a millimeter which is in the green portion of the visible spectrum. Beside red or pink alexandrite can also turn into a purple stone at night under an incandescent light while appearing green at daytime. While some kunzite stones are polished smooth when used in jewelry faceting is quite common to bring out the stone s brilliance.
Beside red or pink alexandrite can also turn into a purple stone at night under an incandescent light while appearing green at daytime. The high quality ones have high transparency and they look beautiful. This shine is called chatoyancy. You can see a linear shine when you expose it to light. The hardness of the mineral is the same as quartz thus making it suitable for use in jewelry.
