This is a massive plate hosting countless miniature Prehnite stalactites or “fingers.” These are not epimorphs where the Prehnite covers the original mineral and the original mineral subsequently dissolves leaving a hollow cast, but rather solid Prehnite stalactites. A very unusual and even rare...

A large piece covered with beautiful radiating sprays (flower-like clusters) of highly lustrous, transparent crystals of Hemimorphite, with great contrast and in excellent condition. This is a great show piece! Location: Mina La Ojuela, Mapimi, Durango, Mexico Size: 13.5 x 10.5 x 6.5 cm

This is a fascinating piece - it features swirls of Rhodochrosite seemingly wrapped around miniature globular aggregates of sphalerite, all on a matrix of quartz. Many of the Rhodo crystal aggregates have an almost rosette-like formation. I had a little trouble capturing the pink...

An unusually large piece of Boulder Opal with an impressive seam of Opal running through it, with multiple smaller seams throughout the sandstone, visible on all sides. Amazing contrast both in color and in luster - a great piece. Location: Andamooka, South Australia Size: 18 x...

This piece hosts several clusters of apple-green Pyromorphite crystals. There is one cluster (top right) where the crystals all seem to have interconnected making an unusual solid mass (irregular aggregate) that I haven’t seen before, yet makes for an amazingly intense color and “greasy”...

Large plate of turquoise blue botryoidal Hemimorphite - great color with a nice silky luster - beautiful piece! Location: Yunan Province, China Size: 12 x 9.5 x 5 cm

A large, iridescent and translucent vein of gemmy opal running through brown sandstone. What an eye-catcher! Location: Maynside/Opalton, Queensland, Australia Size: 6.5 x 6.5 x 3.5 cm

A large, iridescent and translucent vein of gemmy opal running through brown sandstone. What an eye-catcher! Location: Maynside/Opalton, Queensland, Australia Size: 6.5 x 6 x 6 cm

A large, iridescent and translucent vein of gemmy opal running through brown sandstone. The purple-hued opal in the center of the vein is particularly appealing. What an eye-catcher! Location: Maynside/Opalton, Queensland, Australia Size: 10 x 6.5 x 5 cm

This is a very fascinating form of Lepidolite - the outside perimeter of the crystal is more-or-less lavender while the inside is translucent to transparent. A beautiful and interesting show piece, especially when back-lit. Location: Itinga, Minas Gerais, Brazil Size: 12 x 7 x 1 cm...