The two most well-known examples of black gemstones are onyx and obsidian. Comparing the weight of onyx vs. obsidian, which is more reflective and glassy, the difference is smaller.

Agate in UCL Rock Room. Credit: UCL Museums & Collections

Buy Loose Black Onyx Gemstones in all shapes and sizes at GEMS N GEMS. We are Certified No. 1 manmade Gemstones Supplier. Order Now!

Discover recipes, home ideas, style inspiration and other ideas to try.

Black Onyx is a highly coveted gemstone with its pure black and smooth appearance. It is believed to possess special powers, like bringing good luck and repelling negative energy, attracting jewelers, artists, and collectors. Black Onyx is known for its strength, protection, and grounding properties, making it a popula

Neptunite KNa & sub2 ; LiFe & sub2 ; 2 & sub2 ; Ti & sub2 ; Si & sub8 ; O24 9.EH.05 Neptunit-Gruppe 9: SILIKATE (Germanate) E: Phyllosilikate H: Übergangsstrukturen zwischen Phyllosilikat und anderen Silikateinheiten

Shop onyx stones that are tumbled and polished smooth to fit in your pocket. These genuine natural onyx crystals can be used in crystal grids and also make great healing gifts.