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Origin lava stone Lava stone is easily the oldest and most frequently found stone in world. It’s used by an endless amount of cultures. Lava stone literally comes from the core of the earth- fiery brimstone that bubbles to the surface and cools. Once the…

introduction and history of the onyx gemstone Onyx is black and white banded agate. It is often confused with the onyx marble, but in fact it is a limestone. Some varieties of onyx differ in colour, such as sard onyx, which has a brown base…