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Rubellite is the red or pink variety of tourmaline and is a member of elbaite. Rubellite is also the rarest gem in its family. [2] It is occasionally mistaken for ruby. [3] These gems typically contain inclusions. [4] Notable countries where rubellite can be mined include Afghanistan, Brazil, Madagascar, Myanmar, Nigeria, Russia, and the United ...
Oolite. Oolite or oölite (from Ancient Greek ᾠόν (ōión) 'egg stone') [1] is a sedimentary rock formed from ooids, spherical grains composed of concentric layers. [2] Strictly, oolites consist of ooids of diameter 0.25–2 millimetres; rocks composed of ooids larger than 2 mm are called pisolites. The term oolith can refer to oolite or ...
Thunderegg. A thunderegg (or thunder egg) is a nodule -like rock, similar to a filled geode, that is formed within rhyolitic volcanic ash layers. [1] Thundereggs are rough spheres, most about the size of a baseball —though they can range from a little more than a centimeter (one half inch) to over a meter (three feet) across.
Ruby is a pinkish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. [3]
The Lake Winnipesaukee mystery stone is an alleged out-of-place artifact (OOPArt) found in a town near Lake Winnipesaukee in New Hampshire. The stone's age, purpose and origin are unknown. [1] The stone is about 4 inches (100 mm) long and 2.5 inches (64 mm) thick, dark and egg-shaped, bearing a variety of carved symbols, including a face. [1]
Rutilated quartz used as a gemstone. Rutilated quartz is a variety of quartz which contains acicular (needle-like) inclusions of rutile. [1] It is used for gemstones. These inclusions mostly look golden, but they also can appear silver, copper red or black. The inclusions may be distributed randomly or in bundles, which sometimes are arranged ...
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] According to the Book of Imaginary Beings "nobody ever saw it ...
Pyroelectricity. Internals of a pyroelectric sensor. Pyroelectricity (from Greek: pyr (πυρ), "fire" and electricity) is a property of certain crystals which are naturally electrically polarized and as a result contain large electric fields. [1] Pyroelectricity can be described as the ability of certain materials to generate a temporary ...
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