A volcanic bomb is a type of volcanic rock that contains crystals and has been ejected during a volcanic eruption

Product Type: Golden Beryl Heliodor

As highlighted in the photos

and oxygen

3 grams and measuring 75x59x10mm

Calcite Crystal | 96 gr | Limestone Quarry Povodje | Ljubljana, Slovenia Amphibole A volcanic bomb is aThis is an attractive specimen of calcite crystals from Limestone Quarry, Povodje, Ljubljana, Slovenia. The entire top surface of the specimen is covered with many sharp well formed golden calcite crystals. It is in excellent condition. Calcite is found throughout the world in sedimentary, metamorphic, and igneous rocks. Some geologists consider it to be a "ubiquitous mineral" one that is found everywhere. Calcite is the principal constituent of