About this stone
Color
BlackDark Gray
Origin
IndonesiaIcelandItaly
Mohs hardness
3.5–5
Treatment categories
Natural
Industry-standard treatment
Natural — lava rock is unaltered porous volcanic basalt
Mineral chemistry
Basalt — fine-grained volcanic rock dominated by pyroxene and plagioclase feldspar
Crystal system
Mixed (volcanic glass + minerals)
Stone family
Volcanic rock
Common cuts
Round
Common sizes
6mm8mm10mm12mm
Care notes
Porous (Mohs 3.5–5) — popular for essential-oil diffuser jewelry. Mild soap and dry thoroughly; avoid soaking.
Related stones
Basalt, Obsidian, Pumice
Frequently asked questions
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What are lava beads made of?
Lava beads are cut from basalt, the most common volcanic rock on Earth. Basalt forms when molten lava cools rapidly at or near the surface, trapping gas bubbles in the rock as it solidifies. The porous, pitted surface you see on a lava bead is that preserved gas-bubble network — what geologists call a vesicular structure. The natural color is black to dark gray, derived from the iron and magnesium content of the basalt. -
Are lava beads real stone, or are they molded?
Legitimate lava beads — including every strand in Dakota's catalog — are cut from real natural basalt. The porous appearance can lead buyers to wonder if they're reconstituted or molded, but the vesicles are the original gas-bubble structure preserved from when the lava cooled. Some very-low-end material in the broader market is molded or reconstituted; that should be disclosed where it applies. Ask before buying if a strand's source isn't specified. -
Are lava beads dyed?
Dakota's active lava inventory is 100% natural black — the intrinsic color of basalt. The broader bead market sells dyed lava in red, white, blue, purple, green, and yellow; those bright colors are dye applied to the porous surface, which absorbs pigment readily. If a lava strand is a color other than black or dark gray, it's dyed. Treatment should be disclosed — ask before buying if it isn't specified. -
How do lava beads work for essential oils?
The porous structure of basalt absorbs liquids — a few drops of essential oil applied directly to a lava bead soak into the vesicles and release scent slowly over hours. Apply oil sparingly to the bead itself (not over skin or clothing); reapply when the scent fades. The bead doesn't change appearance from oil use, and the porosity recharges as oil evaporates. This is the basis of "diffuser bracelets" — designers building for that customer use lava beads as the functional scent carrier alongside smooth gemstone spacers. -
How durable are lava beads compared to other gemstones?
Less durable than most. Basalt is roughly Mohs 3 to 3.5 — significantly softer than chalcedony-family stones (agate, jasper, onyx at Mohs 6.5–7), and the vesicular surface makes individual beads more fragile than the mineralogy alone suggests. Beads can chip at the rim of pores under impact, and lava will not take a polish the way harder stones do. Avoid ultrasonics, aggressive solvents, and repeated impact against harder beads on the same strand. Clean with a soft cloth and minimal water.