A specimen of green onyx tumbled pocket stone.

Green onyx is a banded variety of chalcedony (microcrystalline quartz, SiO₂) recognized for its layered bands of green, white, and cream. True chalcedony-based onyx forms where silica-rich fluids precipitate in cavities and veins, producing parallel banding that polishes to a fine translucency and smooth sheen. In the lapidary trade the name “green onyx” is sometimes also applied to banded calcite marbles; this listing refers to the chalcedony (quartz) variety, prized for stable color and a durable polish that highlights each specimen’s unique banding.

With a Mohs hardness of 6.5–7, green onyx is well suited to tumbling, carving, and everyday handling. As a microcrystalline quartz it belongs to the trigonal crystal family and shows a vitreous luster and varying degrees of translucency. Notable sources include Pakistan (Balochistan), India, Brazil, and Madagascar; buyers should note that some commercial material is dyed to enhance color uniformity, so natural banding and slight tonal variation are markers of authentic material.

In metaphysical traditions, green onyx is associated with balance, grounding, and prosperity. It is often used to support emotional steadiness and heart-centered focus, and is commonly linked to the Heart and Root chakras—attributes that make it popular both with collectors and those who appreciate stones for symbolic or contemplative use.

About Green Onyx

• Mineral Group: Silicates (Quartz — Chalcedony group)
• Chemical Formula: SiO₂
• Color: Green with white/cream banding (some material dyed commercially)
• Luster: Vitreous
• Hardness: 6.5–7 (Mohs)
• Crystal System: Trigonal (microcrystalline habit)
• Notable Properties: Parallel banding, translucency, smooth polish; sometimes dyed
• Localities: Pakistan, India, Brazil, Madagascar
• Metaphysical Associations: Balance, Grounding, Prosperity, Heart Chakra