Natural Obsidian · 13.4 ct · Freeform · Cabochon · Unheated

This natural Midnight Lace Obsidian weighs 13.40 carats and is fashioned as an individual freeform cabochon, polished on both sides to reveal the distinctive internal banding and flowing structure of the volcanic glass.

Measuring approximately 25.1 × 15.3 × 4.6 mm, the specimen has an elongated organic outline that follows the natural character of the material rather than imposing a conventional geometric shape. The double-sided polish allows the patterning to be appreciated from either side and makes the stone particularly suitable for custom pendant, wire-wrapped or collector designs.

The gemstone displays a predominantly brownish-black body colour, crossed by subtle linear and lace-like variations that create the characteristic appearance associated with Midnight Lace Obsidian. These flowing lines are natural structural features formed within the volcanic glass and give each specimen an individual pattern.

Obsidian is a naturally occurring volcanic glass produced when silica-rich molten material cools rapidly enough to prevent significant crystal growth. Because it is essentially glass rather than a conventional crystalline mineral, Obsidian has an amorphous structure and does not possess a true crystal system.

The material is translucent, allowing limited light transmission through thinner areas while retaining its deep, dark overall appearance. Natural flow structures, subtle internal variations and occasional inclusions or microscopic bubbles may be visible within the material and contribute to its geological character.

The freeform cabochon has been polished on both sides, enhancing the naturally vitreous luster of the Obsidian and providing a smooth, reflective surface. Rather than relying on faceting for brilliance, the visual appeal of this specimen comes from the interaction between its dark body colour, flowing banding and polished glassy surface.

Its organic outline and relatively thin profile make the gemstone particularly versatile for custom jewellery design, especially pendants or wire-wrapped pieces where both polished surfaces can remain visible.

This specimen is recorded as unheated, preserving its naturally occurring colour, banding and internal structure without documented heat enhancement.

With its deep brownish-black colour, naturally flowing lace-like banding and polished double-sided freeform presentation, this 13.40 ct Midnight Lace Obsidian is a distinctive individual specimen. Its organic shape and strong natural patterning make it especially attractive for custom jewellery, wire wrapping or a carefully selected gemstone and mineral collection.