This is a very fine lustrous Stilbite from Parsboro

Approx Weight (per piece):  6

The top of the specimen is covered with many sharp brassy pyrite crystals with some white dolomite

Its dimensions are 26x18x10 mm

This is a very fine specimen of glassy

Olivine Volcanic Bomb | Lava Coated Crystal | 18 gr | Mortlake, Victoria, Australia | SO24 Indicolite Tourmaline This is a very fineAn 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