The color of garnet is influenced by the composition, showing a variety of colors, including red' pink' purple red' orange; Yellow series includes yellow' orange' dense yellow' brown yellow; Green series includes emerald green' olive green' yellow green. The crystal plane is glass luster and sub-diamond luster, and the fracture surface is oily luster. Transparent to translucent. Isotropic objects are neither polychromatic nor birefringent. Garnet can be divided into almandine series (Mg-Al garnet, Al-Al garnet, Mn-Al garnet) and andradite series (Ca-Cr garnet, Ca-Al garnet, andradite). There are many primary deposits in Ziyawu, mainly occurring in magmatic rocks or metamorphic rocks, and gem-grade garnet is mostly found in alluvial placers. Ziyawu is a garnet mineral and a silicate mineral (island silicate) with complex chemical composition, which is usually represented by A3B2 [SiO2] 3. Wherein a represents divalent cations such as Ca2+, Mg2+, Fe2+ and Mn2+, and b represents trivalent cations such as Al3+, Fe3+ and Cr3+. The crystal morphology is rhombic dodecahedron, quadrangular octahedron or a combination of the two. Aggregate is granular or massive.

Garnet (Greek Pyr not Pó s, meaning Fire Eye) is a kind of red garnet, which is equivalent to magnesium aluminum silicate chemically, and its chemical formula is Mg3Al2(SiO4)3. The position of magnesium can be replaced by calcium and ferrous. Garnet varies in color from crimson to almost black. Transparent garnet will be used as a gem.

The variety of garnet from Macon County, North Carolina is purplish red, and it is called rhodolite. English comes from Greek, which means rose. Its chemical composition is an isomorphic mixture of garnet and iron-aluminum garnet, and its specific gravity is two garnets to one iron-aluminum garnet.

There are many trademarks of garnet, such as Bohemian garnet from Czech Republic, and some trademarks are misworded, such as Cape Ruby, Arizona Ruby, California Ruby and Rocky Mountain Ruby. Other interesting findings are that garnet in Madagascar turns blue, which is a mixture of garnet and manganese aluminum garnet. Its blue color is not sapphire blue in weak sunlight, but nostalgic gray blue and green blue occasionally seen in spinel. However, under the irradiation of white light emitting diode, its color becomes the best cornflower blue sapphire, or tanzanite in D area, because blue garnet has the property of absorbing the yellow component of emitted light.

Garnet is an indicator mineral of high-pressure rocks. Some rocks produced in the mantle, such as peridotite and eclogite, usually contain some garnet species. -calcium in the x position.

Calcium iron garnet: Ca3Fe2(SiO4)3 calcium aluminum garnet: Ca3Al2(SiO4)3 calcium chromium garnet: Ca3Cr2(SiO4)3 calcium vanadium garnet (goldite): ca3v2 (sio4) 3 garnet (kimzeyite): ca3 (Zr, Ti)2[Fe]O4]3 garnet: ca3tife (sio4) 3 garnet: ca3 (ti, Fe) 2 [(si, Hydrogarnet containing hydroxyl-calcium at Ti)O4]3 X: ca3al2 (sio4) 3kotoite: ca3al2 (sio4) 3-x (oh) 4x (when x is greater than 1.5) magnesium or manganese is located at the position of x: knorringte): mg3cr2 (sio4) 3.

Mg-Cr garnet

The chemical formula of garnet is Mg3Cr2(SiO4)3. Pure endmember garnet will never appear in nature. Magnesia-chrome garnet can only be produced under high pressure and usually exists in kimberlite. It is used as an indicator mineral to detect the presence of diamonds.