A gemstone or gem, also called a precious or semi-precious stone, is a piece of attractive mineral, which - when cut and polished - is used to make jewelry or other adornments. However certain rocks, (such as lapis-lazuli) and organic materials (such as amber or jet) are not minerals, but are still used for jewelry, and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their lustre or other physical properties that have aesthetic value. Rarity is another characteristic that lends value to a gemstone.
Gemstones are classified into different groups, species, and varieties. For example, ruby is the red variety of the species corundum, while any other color of corundum is considered sapphire. Emerald (green), aquamarine (blue), bixbite (red), goshenite (colorless), heliodor (yellow), and morganite (pink) are all varieties of the mineral species beryl.
There are many different types of minerals which might be found in stones, pebbles and boulders. It depends where the stone or pebble originated from. It was originally part of a larger mass of rock and the origins of that rock (whether it was igneous, sedimentary or metamorphic) would govern what types of mineral may be present in the stone or pebble which has formed from it.
There are a great number of different kinds of stones. There are stones found in the environment and stones created inside the body.
There are several types of stone in the world. A few types of stone are limestone, slate, marble, terrazzo, soapstone, and sedimentary stone.
earth's materialsearth's materials
Some dog breeds can weigh as four stone, depending on size and age. Each stone is 14 pounds so 4 stone is 56 pounds.
Sea Otters are a Key stone species
This is known as a stone Effigy.
Petrified wood has turned to stone, a type of fossil, It is unlikley that you would be able to burn it.
The difference between oysters and cherry stone clams are that oysters can be eaten raw and cherry stone clams can not. Cherry stone clams have a hard shell. The East Coast clam is of medium size , about 2 to 3 inches across. Oysters can be batter fried, shucked into soups and can be found canned, frozen and smoked.
no
stone and wood
No; there are no rock-type Pokemon that evolve by stone.
normal stone
A grave stone.
One type of stone the Mayan valued highly was a stone called or named Jade
"Red stone" does not exist.
what was one type of stone the maya valued highly
no a sun stone is not a shiny stone. you can evolve a gloom with a sun stone or other certain type of Pokemon.
there is no type of government in stone age.because people on that time focus in their living not on politics
By hitting it with a special type of stone, such as flint.
lime stone