What is the name of the mineral used to make the pigment 'cobalt blue'? - Quora

Do any meteorites contain metal? - Quora

What is the name of the mineral used to make the pigment 'cobalt blue'? - Quora

Where is Tanzanite primarily found? - Quora

What causes blue clay in the Earth? - Quora

What is the Jacob Diamond? - Quora

How was lapis lazuli paint, as used before synthetic colours, made? Did the recipe change over time or was it fairly or wholly constant from the time it was first used?

What color is made when you mix white with teal? - Quora

Is Tanzanite a rare gemstone? - Quora

What is this stone? - Quora

Are crystals formed by different minerals the same? How are they different? - Quora

What mineral is this (see link)? - Quora

Can you identify the green vein mineral in serpentinite? - Quora

What gems are corundum? - Quora

Which metal from the periodic table has the color blue? - Quora

How is cobalt used? - Quora