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Druse of prismatic acicular pyromorphite crystals, transparent, shiny and with the characteristic green color. They are arranged on a quartz matrix. A very aesthetic piece from the Nicolau collection (Barcelona) and with a Joan Viñals label.
Rosettes of sharp hexagonal tabular autunite crystals, interpenetrated between them and some isolated. The intense yellow color is characteristic of the species. Crystals are disposed on a pegmatite matrix. This is a sample extracted from Vénachat area late 70's and comes from a reduced extension pegmatite field embedded in granite, near Compreignac. Traces of workings from the 19th century can be found, beside an open pit worked for uranium by COGEMA in 1982-1987. A good quality French historical specimen.
On a barite matrix are disposed several brilliant and very sharp pyromorphite crystals with a very interesting deep olive-green color. They have grow in divergent directions. Some of the crystals are isolated, with an elongated prism. Very interesting under stereomicroscope, we can see excellent crystal growths. Really nice specimen. A classic between classics from this well known french mine closed in 1981. A great opportunity for pyromorphite and old classic mineral collectors.
On a barite matrix are disposed several sharp pyromorphite crystals with a very interesting color olive-green color. They have grow in divergent directions. Some of the crystals are isolated, with an elongated prism. Really excelent specimen. A classic between classics from this well known french mine closed in 1981. A great opportunity for pyromorphite and old classic mineral collectors.
On a quartz matrix are disposed some sharp pyromorphite crystals with a very interesting color zoning between light green in prism faces and yellow tones on terminal pinacoids. Crystals show a hexagonal barrel-shaped prism with flattened terminal faces on the top. They have grow in divergent directions. Some of the crystals are isolated, with an elongated prism. A classic between classics from this well known french mine closed in 1981. A nice specimen of pyromorphite.
On a barite matrix are disposed several sharp pyromorphite crystals with a very interesting color zoning between olive-green in prism faces and yellow tones on terminal ones. Crystals show a hexagonal barrel-shaped prism with the pyramid terminal faces on the top. They have grow in divergent directions. Some of the crystals are isolated, with an elongated prism. Contrasting with the dark brown matrix. A classic between classics from this well known french mine closed in 1981. A great opportunity for pyromorphite and old classic mineral collectors.