A limonite matrix hosts adamite crystal sprays and clusters to about 5 mm. The adamites are lustrous, translucent, and terminated (except for a few around the edges). Most show bright green fluorescence under shortwave UV. The specimen sits as shown without a stand. No damage.

A limonite matrix hosts scattered adamite crystal sprays. The adamites are translucent, lustrous, and terminated, with individual crystals reaching 1.1 cm in length. The specimen is void of both shortwave UV fluorescence and of damage (except for a contact point on one cluster). Sits for display as shown without a stand.

A group of nearly parallel, lustrous and translucent to opaque stilbite blades, accented with tiny but sparkly, scattered quartz crystals. One portion of the matrix along the back is flat and striated, suggesting it is a cast after anhydrite. A few very tiny nicks, otherwise no damage. Displays well without a stand.

From the oldest important silver mine in Bolivia we have 17 grams of silver wire rats-nest specimens, some free of matrix, while others have bits of acanthite (?). The two specimens shown the second and third photos are each about 1.5 cm across. Mount your own thumbnails!

Snow-white, opaque calcite, like popped popcorn. A few of the arms end in translucent, flat, hexagonal crystals. Displays nicely as shown without need for a stand. No damage.

Blebs and lumps of copper on a pale green prehnite/rock matrix. The copper visible in the first picture is 3.9 cm across. The Iroquois Mine is noted for producing copper and/or silver with prehnite association specimens.

Pockets and veins of deep green, crystalline annabergite on a limonite/galena matrix. Individual annabergite crystals reach about 3 mm in length, and some are decorated with small, colorless and frosty calcite crystals. A rich specimen of this uncommon nickel species.

Opaque, deep green to black libethenite crystals on matrix. This specimen is notable for the size of the libethenite crystals, which reach 7 mm across. Sits well for display as shown without need for a stand.

Translucent, greenish yellow mimetite crystals and while translucent to opaque calcite crystals on a limonite matrix. The mimetites reach about 1 mm, whereas the largest calcite is about 4 mm along the crystal edge. The mimetite-lined tunnel visible in the second picture goes all the way through the specimen. A few small, tabular wulfenite crystals round out this interesting association specimen. Sits well for display as shown without need for a stand. No damage.

Sprays of sharp, translucent to opaque colemanite blades on a massive colemanite matrix. Individual colemanite crystals reach 1.3 cm. Only a few terminations are missing. The Sigma Mine is an uncommon borate locality, lying just outside of the Death Valley National Park, where mineral collecting is strictly prohibited. Has a sawn base and back, which do not detract; in fact the sawn base makes for an excellent display base.