What minerals are more beautiful in the world than diamonds is the rock. Vermiculite has a high degree of birefringence and scattering, often producing a colorful "fire". Because of the high refractive index, the meteorite has a diamond-like brightness that is comparable to that of a diamond. The high-dispersion color of the seven-color dispersion is only comparable to synthetic rutile. Although the proportion of meteorite is the same as that of diamond, its hardness is only 5.5, which is different from the single refraction of diamond. The vermiculite has high birefringence, and it can be easily seen from the front. ).
Vermiculite is a secondary mineral that can be found in igneous or metamorphic rocks. It has a distinct wedge-shaped crystal shape and diamond luster. When it melts, it will generate bubbles and turn yellow or brown to black glass. When exposed to the atmosphere, it will gradually lose its color, and after softening, it will become agglomerate composed of pale yellow rutile needle crystals (called leuco). In alkaline pegmatite, large crystals are often produced. Also found in crystalline schist, gneiss, skarn, but also in sand mines. After the vermiculite is altered by the carbonated hot aqueous solution, calcite, quartz and cryptocrystalline rutile are formed.
Both vermiculite and zircon have strong birefringence, as well as high refractive values ​​similar to diamonds, making the two look similar. Specific gravity is a key physical property to identify these two gemstones. The specific gravity of vermiculite is 3.52 for diamonds and 4.70 for zircons. Therefore, zircons weighing one carat will look much smaller than one carat of meteorites. .
The main colors of meteorites are yellow, brown and green. Because of the low hardness, although the meteorite has excellent light and dispersive light, it is rare to choose high-grade jewelry! The main producing areas of meteorites are Australia, Canada, Madagascar, and the United States.
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