Obsidian
Obsidian is a natural volcanic glass that forms when lava solidifies so rapidly that mineral crystals do not have time...
Malachite
Malachite is a common secondary mineral with a vivid green color; formed by the gathering of copper deposits, where it...
Labradorite
Labradorite is a colorful stone that offers a range of colors and optical effects. It is named after its source...