they also have lots of metal inside and can be prepared and cut to show this

Specimen Size:  Large Cabinet-Sized

white feldspar and a little Mossandrite (a rare species) from the remote Kippawa mine

Will come with a Canagem® Collections Specimen Card

Olivine Volcanic Bomb | Lava Rock Crystal | 174.3 gr Slice | Mt Shadwell Volcano, Australia | SO24 Observed Fall they also have lots ofAn olivine volcanic bomb is a type of volcanic rock that contains olivine crystals and has been ejected during a volcanic eruption. Olivine is a mineral that is commonly found in the Earth's mantle and is one of the first minerals to crystallize as magma cools. Volcanic bombs are large clots of lava that are ejected from a volcano during an explosive eruption. They can vary in size, and their shapes are often streamlined due to their molten nature as