Agate 18x25mm Brown Oval Bead - 15-16 Inch Shape_Coin It is also one of

It is also one of the hardest

while today it is primarily mined in Africa

also known as Melody's Stone

One of the best-known physical properties of topaz is its hardness

the resulting rock is dark gray to deep black in color and riddled with pits and holes where air was trapped in the stone

Agate 18x25mm Brown Oval Bead - 15-16 Inch Shape_Coin It is also one ofAgate is a common, often banded, variety of chalcedony quartz that forms within volcanic rock cavities, featuring a Mohs hardness of 7. Known for its translucent, layered appearance in various colors, it is commonly used in jewelry, decorative items, and for spiritual purposes.