The following is a list of Hydrosulphate gems and minerals listed in our database. Click the pictures to get full data, click the X to remove the gem from the list.
Brazilianite: Brazilianite is a soft and brittle mineral that in general does work very well as a gemstone. It's soft at 5.5 Mohs, and so it will quickly either shear apart, or crumble at the edges. As one might guess Brazilianite was first discovered in Brazil. It tends to be a yellow or light yellowish green mineral. This mineral has also been found in New Hampshire, United States. The mineral is so rare it (read full)
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Obsidian is an extrusive igneous rock, a volcanic glass formed by rapid cooling.
Its essential component is glass. Its accessory comp
Sapphire is the blue variety of Corundum.
Sapphires can be a very dark blue, to the point of seeming dense and blackish from a distanc
Titanite is a very rare calcium titanium silicate that is an important ore of titanium. It is also called Sphene. Its crystals are very
Sodalite is a sodium aluminum silicate chloride in the Sodalite group with an isometric crystal system. Its royal blue forms are the be