Copper ("Spinel"-twins)This robust miniature sized display specimen of Native Copper has a dual identity as it features a pair of dramatically different intergrown "Spinel" twins. One side features a group of stout and thick "Spinel" twins which are characterized by their gorgeous smooth crystal faces and hollow negative faces all around. The other side hosts a gentle, elongated, slender "Spinel" twinned group with a more flattened style and graceful surface striations that

From the collection of T

It goes without saying that specimens of Phosphophyllite with crystals this size can be exceptionally pricey in some cases

From the collection of Willard W

A pristine

If you collect thumbnails

Only a small percentage of the Cassiterites from Viloco are associated with Tourmaline

A rather GLASSY

A classic single crystal of Vivianite from the famous Siglo XX mine

The specimen was analyzed by Gene Foord years ago

The largest crystal measures 2

you can see strong red-pink color coming through in areas

leaving behind only the Quartz crystal "crust" replacement