Rocks and Minerals

Amethyst

January 3, 2018 // 0 Comments

What is Amethyst? Amethyst is a purple colored mineral that is considered a valuable gemstone. It has a vitreous luster, and [...]

Pyrolusite

December 26, 2017 // 0 Comments

What is Pyrolusite? Pyrolusite is a dark black or grey mineral, but it can sometimes have a tint of blue. It has a streak of [...]

Calcite

August 17, 2017 // 0 Comments

What is Calcite? Calcite is a carbonate mineral, which means it contains a carbonate ion. The chemical formula of calcite is [...]

Magnetite

August 16, 2017 // 0 Comments

What is Magnetite? Magnetite is the most common iron oxide mineral. With a chemical formula of Fe3o4, it has the highest [...]

Pyrite

July 25, 2017 // 0 Comments

What is Pyrite? Pyrite is an iron sulfide mineral, which means it is a compound of iron and sulfur. It is the most common [...]

Hematite

July 3, 2017 // 0 Comments

What is Hematite? Hematite is the mineral form of iron(III) oxide, which is one of the types of iron oxides(chemical [...]

Gypsum

June 28, 2017 // 0 Comments

What is Gypsum? Gypsum is a soft mineral that is naturally clear, white, gray, yellow, red, or brown. Gypsum’s streak [...]

Talc

February 15, 2016 // 0 Comments

What is talc? Talc is the softest mineral that we know of, and has a hardness of 1 in the¬†mohs hardness scale. Talc’s [...]

Quartz

January 3, 2016 // 0 Comments

What is Quartz? Quartz is a very common and well-known mineral. It is the most abundant mineral discovered on Earth. It has [...]
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