Fulgurite specimens – Lightning Glass

Fulgurite specimens, known as ‘Lightning Glass’, typically collected in Algeria.


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Fulgurite specimens - Lightning Glass

Fulgurite specimens, known as 'Lightning Glass', typically collected in Algeria.

Fulgurites form when lightning strikes sand or silica rich soil in a large flat area like a desert or beach.

As lightning strikes the highest point around, and deserts tend to be very flat, lightning often hits the sandy floor. They are typically hollow, with a rough outer surface and a smooth, shiny inner surface. A lot of the smaller pieces are just rough lumps, though, and may not have a hole.

As these pieces are quite fragile, we tend to overpack them. Unfortunately, this does mean charging more for postage - we don't send these as large letters.


Our current stock is quite thin, fine pieces of Fulgurite. They are really rather delicate so be careful! 🙂


We currently have one slightly larger than normal specimen in stock:

  • #1 - 75x61x14.5MM, from Algeria - it is a largely flat lump and does not have a hollow tube all the way through, although the tube formation can be seen at either end.



The pictures you see here are representative of the products and are usually not the exact item you will receive. Where various grades are available we do try to photograph each grade - but some photographs are still on their way!

Additional information

Weight 0.05 kg
Dimensions 6 × 4 × 3 cm

20-35MM, #1 – 75x61x14.5MM, 5-15MM, 15-25MM

10-20MM with hole, 5pcs, 20-30MM with hole, 5pcs, 30-40MM with hole, 1pc, 10-20MM without a hole, 5pcs, 20-30MM without a hole, 5pcs, 30-40MM without a hole, 1pc


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