Garnet belongs to brilliant waiting for an axis to fasten gem, on crystal structure, belong to insular shape silicate, brilliant face grows it is thus clear that grain. Because of this kind of appearance very the seed of a bead that opens like pomegranate, also be in English and Latin " resemble a seed " meaning, call stone pyrope so, abbreviation garnet.
Physical nature field: Refractive index: 1.74-1.90. Hardness: 7-8. Density: 3.5-4.3g/cm3.
Producing area: The country such as sri lanka, India, Madagascar, United States, China. The area of more than 10 provinces of our country all discovers lapidary class garnet is mineral.
Color respect
Common be red (particular branch is wine red, mei red, violet Mei is red 3 kinds)
The characteristic with garnet the most intuitionistic naked eye is:
One, proportion is very large (than other crystal kind gem wants big) , say popularly, want more lapidary than other crystal weight to want to weigh namely.
2, because be natural grown junction the gem of brilliant, so very natural, in-house meeting has day of grain that grows like that, ice is cracked, cotton body (the growth of similar batt grain) , these are very common, if what impurity is done not have, not be highest grade has filled up namely.
3, the hardness of garnet is bigger, crystallization system is very small, grain is so big very few.
False garnet, bit more advanced method is, artificial imitate is natural garnet crystallization process, with industrial measure, accelerate the crystallization rate of garnet, grow thereby a man-made garnet, because be crystallization process very short, so, garnet of this kind of synthesis will be very normally pure, without foreign matter, without natural garnet should some is natural grow grain, for instance batt, ice is cracked etc, the glossiness that can consult respect of man-made crystal another is it is good without natural garnet also, not so moist. Elementary method is, direct fusion is synthesized, garnet of this kind of man-made is used at inlaid drop extent normally.
Gem worker distinguishs is the understanding of this appearance commonly:
Garnet a group of things with common features gem basically leans refractive index and absorb spectrum or density to distinguish, although color is one of criterion, but differentiate only by color breed and differentiating high-end mimic is not actual. The garnet of all sorts of color has a variety of as similar as its color gem.
One. Refractive index. Refractive index is main appraisal basis. For example, garnet but refractive index of have the aid of is divisional it is together all pledge pointed spar of the gender, synthesize pointed spar, cubic zirconia, glass and rare earth glass or plastic wait.
2. Polarizing with 2 kinds of sexes. But have the aid of is polarizing gender and have will distinguish without 2 kinds of sexes the corundum of refractive index close (Gong Labao) , synthetic corundum (synthesize Gong Labao) , chrysoberyl, zircon, the blame such as Tansangshi all plastid is lapidary.
3. Wrap up body. Distinguish through lapping body feature comes the gem with a few same refractive index, if refractive index is close of the garnet of 1.73 and pointed spar divisional.
