Midnight Lace Obsidian and Its Hidden Ribbons

What is midnight lace obsidian?

Midnight lace obsidian is a variety of black obsidian threaded with fine, tightly winding ribbons, darker or lighter than the background, tracing a lace-like pattern.

Its particularity lies in how it reveals itself. Sitting on a table, lit from above, it looks like any other black obsidian. Held up to a light source, it changes completely: the ribbons appear, cross, ripple. It's a variety that needs a deliberate gesture to exist.

It stays little known in the trade, found mostly among collectors and lapidaries. You'll find it alongside the others in my guide to obsidian varieties.

Where do its ribbons come from?

Unlike rainbow obsidian or fire obsidian, whose colours come from an optical effect, midnight lace rests on a genuine physical structure. The ribbons exist within the material itself: they aren't reflections.

The phenomenon is called flow banding. When silica-rich lava flows, it's extremely viscous, comparable to very cold honey. This viscosity means it doesn't mix: it flows in parallel layers that slide against one another without blending. This is known as laminar flow.

Each layer has a slightly different composition, a few more microcrystals here, a few more gas bubbles there. These tiny variations are enough to change how light passes through the glass. When the flow suddenly freezes, the layers stay in place, and the folding built up during the flow becomes these winding patterns.

In other words: you're looking at the movement of a lava flow, stopped dead in its tracks. The swirls of the lace are the turbulence of that flow, frozen exactly as it was. To understand this process, see my article on how obsidian is formed.

The backlight test

Since the ribbons depend on differences in how light passes through, there's only one correct way to view them: from behind.

• Face a window or a lamp, and hold the stone between your eye and the light source;
• Favour thin areas, an edge, a thin-cut piece. The thicker the material, the less light gets through;
• Turn it slowly: the ribbons distort and change appearance depending on the angle;
• A torch held against the stone gives excellent results, the technique lapidaries use.

This is also why the finest pieces are cut as thin slabs or cabochons, rather than thick beads. An 8mm bead will let almost nothing through.

Midnight lace, spiderweb, or snowflake?

Three patterned varieties, often confused, yet very different in both origin and appearance.

The most useful distinction is the way it's viewed. If the pattern is easy to see in plain light, it isn't midnight lace, it's likely snowflake obsidian or spiderweb obsidian. Lace, on the other hand, hides.

The second marker is the nature of the pattern. Lace produces curved, parallel lines following an overall flow, like the folded strata of a cliff. Spiderweb produces an angular, chaotic network with no common direction, since it comes from fractures. Snowflake produces round patches, with no lines at all.

The properties credited to midnight lace

As with fire obsidian, a clarification is needed: this is a recent trade name, coined within the English-speaking lapidary world. This variety has no ancient tradition of its own, and the correspondences credited to it were formulated in recent decades, often by analogy with its pattern.

That said, the qualities credited to it today hold together logically:

• revealing what's hidden, a direct analogy with its pattern being invisible in plain light;
• patience and attention: it's a stone that asks for a deliberate gesture to show itself;
• protection and grounding, qualities shared by every obsidian;
• untangling complex situations, by analogy with its interwoven ribbons.

As for chakras, it's linked to the root chakra like every obsidian, and sometimes to the third eye for its dimension of seeing the unseen. The full picture is in my guide to obsidian and chakras.

How to choose and wear it

Midnight lace poses a genuine practical problem: its pattern isn't visible while worn. A stone set in a ring or strung on a bracelet stays black, since light can't pass through it from behind.

Two practical takeaways:

• Favour thin pieces, polished slabs, thin cabochons, flat pendants. The thinner the piece, the more easily the pattern reveals itself;
• Think of it as an object to look at rather than jewellery to wear. Set near a window, it changes throughout the day.

If you're mainly after an obsidian to wear every day, classic black obsidian offers the same grounding energy with a permanent presence, and it's the one I actually work with in the studio, unlike midnight lace.

Mineral data sheet

Care and cleansing

Care is the same as for every obsidian, with particular attention to the polish: a dulled surface lets less light through, and the pattern fades accordingly.

• Cleaning, a soft, dry cloth. For fingerprints, which interfere with viewing by transmitted light, a microfibre lens cloth works well;
• Cleansing, smoke cleansing, or a brief rinse in clear water. Avoid salt, which micro-scratches the surface;
• Charging, moonlight, without prolonged sun exposure;
• Fragility, thin pieces are brittle. Handle them flat and store them alone.

The full run-down is in my guides to cleansing and charging obsidian.

Frequently asked questions