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Most consider gems to be rare crystalline minerals of high Mohs hardness, with a degree of clarity.

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10y ago

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What are examples of transparent items?

Transparent means things that you can see through. Some examples are glass, air, water, and a window. There is a thing such as opaque transparency.


Where are gem found?

Most precious gems such as diamonds can most commonly be find in and around volcanoes or volcanic tubes.Gems are found all over the world, depending on which gems you are looking for. South Africa is well known for diamonds but they are also found in Brazil and Siberia/Russia. Emeralds are found in Colombia and Siberia. Rubies are found in Australia, Montana/USA, and Vietnam.


How many minerals are considered gems?

Gems are mineral crystals which have been cut, faceted, and polished. They count.


Where do stones come from?

You can get white rocks for your fish tank from pet stores such as Petco and Pet Smart. They sell gravel and rocks of various sizes and colors for fish tanks.


Scientists divide rocks into groups based on what?

Rocks are grouped by how they are formed. There are 3 types of rocks. Sedimentary, Metamorphic, and Igneous rock. Sedimentary rocks are made from broken down rocks, called sediment, which come from all three rocks. Metamorphic rocks come from existing rocks that are changed by heat and pressure. The Igneous rocks are formed from magma that rose up to the surface, also known as lava. When the lava cools and hardens it forms igneous rocks. That is a rock cycle. Rocks are grouped by how they are formed. There are 3 types of rocks. Sedimentary, Metamorphic, and Igneous rock. Sedimentary rocks are made from broken down rocks, called sediment, which come from all three rocks. Metamorphic rocks come from existing rocks that are changed by heat and pressure. The Igneous rocks are formed from magma that rose up to the surface, also known as lava. When the lava cools and hardens it forms igneous rocks. That is a rock cycle.