Welo Fire Ethiopian Opal Rough Crystals – Natural Honeycomb Opal and Rainbow Flash for Jewelry Making

It refers to the way the color play looks broken into small cell-like patches across the stone's surface, similar to a honeycomb pattern, instead of one continuous color band.

Not really more fragile, but it does have higher water content than some other opal types, so it should still be kept away from very dry heat or sudden temperature changes.

Fire intensity depends on the internal structure of each piece, and that varies naturally even within stones cut from the same rough batch.

Welo opal is usually cut as cabochons rather than faceted, since faceting tends to reduce the visible color play that makes this stone valuable.

Welo specifically refers to the region in Ethiopia where this material is mined — it's considered some of the higher-fire material compared to opal from other Ethiopian deposits.