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Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [ citation needed ] but it has also been mined in the Lower Silesia region of Poland .
Prasiolite, an olive colored material, is produced by heat treatment; [68] natural prasiolite has also been observed in Lower Silesia in Poland. [69] Although citrine occurs naturally, the majority is the result of heat-treating amethyst or smoky quartz. [68] Carnelian has been heat-treated to deepen its color since prehistoric times. [70]
Technically, anything over 20 years old can be coined "vintage." But when you truly think of items worth this title, your brain doesn't go to Beanie Babies. Instead, it conjures up images of vinyl...
Your car’s longevity, and your safety, are worth the extra cost. Go Cheap: USB Charging Cables In a world where everyone is plugged in, USB cables are a necessity — but not worth splurging on.
As befitting a quintessential pop diva worth over $300 million, Mariah Carey’s engagement ring from former finance James Packer cost an estimated $10 million, according to Brides — the highest ...
Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel.Its color is normally apple-green, but varies from turquoise-like cyan to deep green.
Moss agate pebble, 1 inch (25 mm) long Montana moss agate. Moss agate is a semi-precious gemstone formed from silicon dioxide.It is a form of chalcedony which includes minerals of a green color embedded in the stone, forming filaments and other patterns suggestive of moss. [1]
National net wealth, also known as national net worth, is the total sum of the value of a country's assets minus its liabilities. It refers to the total value of net wealth possessed by the residents of a state at a set point in time. [ 1 ]