Heavy liquids use the bouyancy principle that says a solid will sink in a liquid whose SG is lower, float in one whose SG is higher, and remain suspended in a liquid whose SG is equal to its own. ...
Heavy Liquid
A liquid of known specific gravity, used to test the specific gravity of a gemstone.
Using heavy liquids to measure specific gravity starts with several containers of different liquid solutions, each with gradually increasing density.
Methylene iodide is a heavy liquid (sp. g. 3.32), on which a "quartz-topaz," for example, sp. g. 2.66, would float, but a true topaz, sp. g. 3.53, would sink in it.
To arrive at a relative measure of specific gravity, heavy liquids are used. Gems are placed in liquids of a known specific gravity.
98, this value, way beyond the range of commercially sold heavy liquids usually used to determine Specific gravity. Therefore a special solution called "Clerici" is used.
Specific weight can also be ascertained with heavy liquids of known specific gravity. The stone is immersed in the liquid: ...
For the gemologist who lacks a more precise method than the usual heavy liquids to determine specific gravity, the location of the interference figures to differentiate the uniaxial beryl from the biaxial amblygonite can be of the utmost importance.
2.9 g/cm3), soluble in acetone; di-iodomethane (CH2I2, density 3.3 g/cm3), soluble in chloroform, CHCl3; and Clerici's solution (a solution of thallium formate and thallium malonate; density 4.4 g/cm3), soluble in water, are some heavy liquids and ...
Hardness: soft heavy liquid
Comments (there are a lot of them...) Mesolite ... see natrolite
Meteorite ... see iron and pyrrhotite Miargyrite...antimony sulfide ...AgSbS2
Crystal system: monoclinic
Color: black to gray ...
 See also: Specific gravity, Crystal, Natural, Gem, Stone
  
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