CALCITE
Calcite is a mineral with a chemical formula of CaCO3. It is extremely common and found throughout the world in all three kinds of rocks. Furthermore, Calcite is the principal mineral of limestone and marble (two of the most common rocks on our planet). Calcite's properties make it one of the most widely used minerals. It can be used as a construction material, abrasive, agricultural soil treatment, construction aggregate, pigment, pharmaceutical and more.
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TOPAZ
Topaz is a silicate mineral most often found in igneous rocks Topaz is not an abundant mineral, but it does occur worldwide. It is also a very popular gemstone. Gem quality topaz most commonly occurs in nature as a colorless crystal, but a significant amount of natural topaz also occurs in a color range spanning from yellow to brown. Small amounts of natural blue and pink topaz are also found but rare. Another rare quality of topaz is the matrix which is much desired, since the perfect basal cleavage of Topaz causes it to separate from its base and form loose crystals.
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