Collectible mineral crystal. Cobalt on Calcite. 250 gr. - 10x8x4 cm

Rare Heavy collectible mineral crystal. White Quartz on pale violet Fluorite. 1,8 kg. - 17x8x13 cm

Calcite with Marcasite Phantoms Linwood Quarry Buffalo, IA 2lb 8oz

Calcite Buffalo, IA 2lb 14oz

Marcasite Phantom Calcite Missouri 2oz

Calcite Clusters Buffalo, Iowa 8oz

Aegerine on Calcite ~ Kinney Calcite Quarry, Arkansas 6oz

Red Hemimorphite on Calcite Mexico

Exterior and Interior Rutilated Quartz with Calcite Minas Geralis Brazil

Calcite Mexico 5lb 11oz

Double Refractive Rainbow Filled Calcite Mexico 14oz

Double Refractive Calcite with Rainbows 5oz

Amethyst Flower with Calcite Uruguay 1lb 12oz

Fluorescent Calcite and Fluorite Red Cloud Mine AZ 2lb 11oz

Citrine Cluster with Calcite Brazil 12 x 10.5"

Sand Calcite Crystal Cluster. Rattlesnake Butte, South Dakota

Rare Halloysite Crystal Inclusions and Very Rare Halloysite Psuedomorphs After Calcite New Find Colombia 1lb

Rare Copper Included Calcite Michigan 11.2g

Rare Purple Centered Calcite 1970s Find Pitcher, Oklahoma 6lb 12oz

Optical Calcite Double Refraction 5g

Septarian Slab Calcite/Aragonite Utah

Optical Calcite Double Refraction 2oz

Banded Red x Green Calcite Mexico 5lb 3oz

Calcite Crystals on Purple Fluorite Denton Mine Southern IL 6oz

Extra Large Apatite in Calcite 1980s Canada