Black Onyx Round Cabochon – 20x20 mm Natural Smooth Flat Back Gemstone for Jewelry Making

Add a bold and timeless touch to your jewelry designs with this black onyx cabochon. Known for its deep, glossy black color and smooth finish, black onyx is a classic gemstone that brings elegance and sophistication to any piece.

This 20x20 mm round cabochon is carefully shaped and polished to achieve a sleek, mirror-like surface with a flat back, making it perfect for bezel setting, wire wrapping, and various jewelry-making techniques. Its larger size and classic round shape make it ideal for statement rings, pendants, and standout jewelry designs.

Each gemstone offers a rich, uniform color that enhances its refined and luxurious appearance.

Specifications:

Stone Name: Black Onyx

Shape: Round Cabochon

Size: 20 x 20 mm

Back: Flat Back

Finish: Smooth and polished

Key Features:

Deep black color with high gloss finish

Classic and elegant gemstone

Smooth and mirror-like surface

Ideal for statement and bold jewelry designs

Suitable for both beginners and professional jewelers

Jewelry Metal: Gemstone Jewelry Stone: Onyx