What is the chemical formula for garnet?
Garnet is a rather complex mineral that has a general chemical formula of R3R2(SiO4)3, where R3 is a bivalent (gives up two electrons) metal and R2 is a trivalent (gives up three electrons) metal when forming a chemical bond.
How is garnet made?
Most garnet forms when a sedimentary rock with high aluminium content, such as shale, is metamorphosed (subjected to heat and pressure). The high heat and pressure breaks the chemical bonds in the rocks and cause minerals to recrystallise. Garnets can also be found in igneous rocks such as granite and basalt.
Is garnet cleavage or fracture?
| Garnet | |
|---|---|
| Cleavage | Indistinct |
| Fracture | conchoidal to uneven |
| Mohs scale hardness | 6.5–7.5 |
| Luster | vitreous to resinous |
What makes garnet red?
The exact cause of the various colors is suggested to be due to chemicals present in the garnet. Iron may impart red and yellow-green; yellow, orange and black (often with titanium); also purple when chromium is also present as well.
What type of silicate is garnet?
Garnets comprise a group of silicates with the general formula A3B2(SiO4)3 in which A = Ca, Fe2+, Mg, Mn2+; B = Al, Cr, Fe3+, Mn3+, Si, Ti, V, Zr; and Si may be replaced partly by Al, Ti, and/or Fe3+.
What is garnet sand?
Garnet sand is a mineral and iron-free product which has universal uses. As an abrasive sand, its main area of use is high-pressure water jet cutting. In addition, many customers use garnet sand for sweeping zinc-plated parts or for cleaning building exteriors.
Where can I find Garnet?
Today, different types of garnet are found across different parts of the globe. Pyrope Garnet is located in Brazil, India, Sri Lanka and Thailand. Almandite is found in parts of Brazil, India, Madagascar, and the US. Spessartite is also found in Brazil, as well as China, Kenya, and Madagascar.
Is Garnet metamorphic?
The rock-forming garnets are most common in metamorphic rocks. A few occur in igneous rocks, especially granites and granitic pegmatites. Garnets derived from such rocks occur sporadically in clastic sediments and sedimentary rocks. Indeed, the red-coloured grains that are commonly found along some beaches are garnets.
Is garnet metamorphic?
What is the July birthstone?
Ruby
Read About the Ruby, the Birthstone for July – American Gem Society.
Is garnet igneous sedimentary or metamorphic?
The rock-forming garnets are most common in metamorphic rocks. A few occur in igneous rocks, especially granites and granitic pegmatites. Garnets derived from such rocks occur sporadically in clastic sediments and sedimentary rocks.