Lilac Obsidian
Volcanic glass (SiO2-based)
A soft pale-purple glass sold as obsidian; uniform lilac material is essentially always manufactured glass rather than natural volcanic obsidian.
- Mohs hardness
- 5-6
- Color
- Soft pale lilac-purple, translucent
- Type
- igneous
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Overview
Lilac Obsidian is a trade name for soft, pale purple translucent glass marketed as obsidian. Like violet and lavender "obsidian," a clean, uniform lilac tone is a clear indicator of manufactured glass rather than natural volcanic obsidian, which does not occur in pastel purples.
Natural obsidian's colors come from iron and from optical sheen, giving blacks, browns, grays, and metallic flashes — not a translucent lilac body color. The pale purple here is produced with added colorants such as manganese during glassmaking.
It is sold for its gentle color in beads, spheres, and tumbled stones; absent documented natural origin, it should be regarded as decorative glass.
Formation & geology
True obsidian forms when silica-rich lava cools too quickly to crystallize, freezing into glass colored mainly by iron. Pastel purples are not part of obsidian's natural palette.
Lilac glass is manufactured by melting silica with fluxes and adding small amounts of colorants (manganese for purple shades), then cooling. The pale tone reflects a low colorant concentration.
Consequently, "lilac obsidian" usually has no natural volcanic source and is an artisanal or industrial glass product.
How to identify it
Be skeptical of evenly colored pale lilac "obsidian." Manufactured glass shows uniform color, rounded internal bubbles, swirl or pour marks, and sometimes mold seams.
Natural obsidian is dark-bodied; any purple appears only as a directional sheen, never as a transparent pastel. Both share vitreous luster, conchoidal fracture, hardness near 5-6, and white streak, so the soft uniform color plus bubbles are the decisive clues.
A clear, consistently lilac piece with internal bubbles is almost certainly man-made glass.
Uses & significance
Lilac Obsidian (glass) is used for gentle-colored beads, pendants, spheres, and ornamental carvings, valued as an inexpensive, pretty decorative material.
It has no industrial use beyond ordinary colored glass.
Metaphysical sellers may link the soft purple to calm, intuition, and spiritual themes, but as a typically manufactured glass these are marketing associations; honest disclosure of glass origin is the ethical practice.
Frequently asked questions
Is lilac obsidian a natural gemstone?
No. Pale uniform lilac "obsidian" is manufactured glass; natural obsidian does not form in pastel purple colors.
Why is it called obsidian then?
It is a trade name; the material is glass, and obsidian is technically natural volcanic glass, so sellers borrow the name.
How do I confirm it is glass?
Look for even pastel color, internal bubbles, swirl or pour lines, and mold seams, all signs of manufactured glass.
Is it still nice for jewelry?
Yes, as a soft-colored decorative glass, provided it is sold honestly as glass rather than a natural stone.
Lilac Obsidian guides
In-depth guides for identifying, valuing, and understanding Lilac Obsidian.
