A rare mineral that can be cut and polished could be called a gemstone.
Yes.
Yes.
This would be called a gemstone.
crystals
A mineral that is rare and can be cut and polished is called a gemstone. Gemstones are typically prized for their beauty, rarity, and durability, making them valuable for use in jewelry and other decorative items. Examples of gemstones include diamonds, rubies, emeralds, and sapphires.
One example of such a mineral is diamond, known for its brilliance and hardness. When cut and polished, diamonds exhibit a stunning play of light due to their high refractive index. This makes them highly sought after for use in jewelry and other luxury items.
Some rare minerals that can be cut and polished include benitoite, serendibite, and musgravite. These minerals are valued for their beauty and unique colors, making them popular among collectors and jewelry designers.
Diamond
Diamonds are rare and when cut and polished are extremely beautiful.
Gems are mineral crystals which have been cut, faceted, and polished. They count.
No, Hematite is basically iron oxide in a mineral state, rust is another state of iron oxide. It can be polished to a luster resembling the look of steel
Barite is a transparent to translucent mineral. It typically appears opaque in its most common form, but some specimens can exhibit a degree of transparency when cut and polished.