RARE Green PYROMORPHITE Crystal Cluster Cabinet Mineral Specimen Thumbnail
Item History & Price
| Reference Number: Avaluer:30492923 | Weight: 2.66 grams |
| Country/Region of Manufacture: China | Type: Pyromorphite |
| Size: 20 mm x 18 mm x 14 mm |
This specimen weighs 2.66 grams. It measures 20 mm x 18 mm x 14 mm.
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Hi there, I am selling this really nice pyromorphite crystal mineral specimen. It is really beautiful. It is a collection piece of mine that I have had. This was collected in Guangxi Province, China. If you have any questions, do not hesitate to ask me. Thanks so much for visiting my auction and have a great day!
The following is information about this from wikipedia:
PyromorphiteFrom Wikipedia, the free encyclopediaPyromorphitePyromorphite-171694.jpgGeneralCategory Phosphate mineralApatite groupFormula(repeating unit) Pb5(PO4)3ClStrunz classification 8.BN.05Crystal system HexagonalCrystal class Dipyramidal (6/m)
(same H-M symbol)Space group P63/mIdentificationColor Dark grass-green, green, yellow, yellow-orange, reddish orange, yellow-brown, brown, tan, grayish, may be colorlessCrystal habit Prismatic to acicular crysals, globular to reniformTwinning Rarely on {1122}Cleavage Imperfect- [1011]Fracture Uneven to sub-conchoidalTenacity BrittleMohs scale hardness 3.5-4Luster Resinous to subadamantineStreak WhiteDiaphaneity Transparent to translucentSpecific gravity 7.04 measured, 7.14 calculatedOptical properties Uniaxial (-) May be anomalously biaxial -Refractive index nω = 2.058 nε = 2.048Birefringence δ = 0.010Pleochroism WeakUltraviolet fluorescence May fluoresce yellow to orange under LW and SW UVOther characteristics Piezoelectric if biaxialReferences [1][2][3]Pyromorphite is a mineral species composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. Crystals are common, and have the form of a hexagonal prism terminated by the basal planes, sometimes combined with narrow faces of a hexagonal pyramid. Crystals with a barrel-like curvature are not uncommon. Globular and reniform masses are also found. It is part of a series with two other minerals: mimetite (Pb5(AsO4)3Cl) and vanadinite (Pb5(VO4)3Cl), the resemblance in external characters is so close that, as a rule, it is only possible to distinguish between them by chemical tests. Paecilomyces javanicus is a mold collected from a lead-polluted soil that is able to form biominerals of pyromorphite [4]
They were formerly confused under the names green lead ore and brown lead ore (German: Grünbleierz and Braunbleierz). The phosphate was first distinguished chemically by M. H. Klaproth in 1784, [5][6] and it was named pyromorphite by J. F. L. Hausmann in 1813.[7][8] The name is derived from the Greek for pyr (fire) and morfe (form) due to its crystallization behavior after being melted.[2]
Contents 1 Properties and isomorphism2 Image gallery3 See also4 References5 External linksProperties and isomorphismThe color of the mineral is usually some bright shade of green, yellow or brown, and the luster is resinous. The hardness is 3.5 to 4, and the specific gravity 6.5 - 7.1. Owing to isomorphous replacement of the phosphorus by arsenic there may be a gradual passage from pyromorphite to mimetite. Varieties containing calcium isomorphously replacing lead are lower in density (specific gravity 5.9 - 6.5) and usually lighter in color; they bear the names polysphaerite (because of the globular form), miesite from Mies in Bohemia, nussierite from Nuizière, Chénelette, near Beaujeu, Rhône, France, and cherokine from Cherokee County in Georgia.
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I offer a shipping discount for customers who combine their payments for multiple purchases into one payment!
The discount is regular shipping price for the first item and just 50 cents for each additional item!
To be sure you get your shipping discount just make sure all the items you want to purchase are in your cart.
Auctions you win are added to your cart automatically.
For any "buy it now" items... or second chance offers, be sure to click the "add to cart" button, NOT the "buy it now" button.
Onceall of your items are in your cart just pay for them from your cart andthe combined shipping discount should be applied automatically.
I offer a money back guarantee on every item I sell.
If you are not 100% happy with your purchase just send me a message to let me know
and I will buy back the item for your full purchase price.
Hi there, I am selling this really nice pyromorphite crystal mineral specimen. It is really beautiful. It is a collection piece of mine that I have had. This was collected in Guangxi Province, China. If you have any questions, do not hesitate to ask me. Thanks so much for visiting my auction and have a great day!
The following is information about this from wikipedia:
PyromorphiteFrom Wikipedia, the free encyclopediaPyromorphitePyromorphite-171694.jpgGeneralCategory Phosphate mineralApatite groupFormula(repeating unit) Pb5(PO4)3ClStrunz classification 8.BN.05Crystal system HexagonalCrystal class Dipyramidal (6/m)
(same H-M symbol)Space group P63/mIdentificationColor Dark grass-green, green, yellow, yellow-orange, reddish orange, yellow-brown, brown, tan, grayish, may be colorlessCrystal habit Prismatic to acicular crysals, globular to reniformTwinning Rarely on {1122}Cleavage Imperfect- [1011]Fracture Uneven to sub-conchoidalTenacity BrittleMohs scale hardness 3.5-4Luster Resinous to subadamantineStreak WhiteDiaphaneity Transparent to translucentSpecific gravity 7.04 measured, 7.14 calculatedOptical properties Uniaxial (-) May be anomalously biaxial -Refractive index nω = 2.058 nε = 2.048Birefringence δ = 0.010Pleochroism WeakUltraviolet fluorescence May fluoresce yellow to orange under LW and SW UVOther characteristics Piezoelectric if biaxialReferences [1][2][3]Pyromorphite is a mineral species composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. Crystals are common, and have the form of a hexagonal prism terminated by the basal planes, sometimes combined with narrow faces of a hexagonal pyramid. Crystals with a barrel-like curvature are not uncommon. Globular and reniform masses are also found. It is part of a series with two other minerals: mimetite (Pb5(AsO4)3Cl) and vanadinite (Pb5(VO4)3Cl), the resemblance in external characters is so close that, as a rule, it is only possible to distinguish between them by chemical tests. Paecilomyces javanicus is a mold collected from a lead-polluted soil that is able to form biominerals of pyromorphite [4]
They were formerly confused under the names green lead ore and brown lead ore (German: Grünbleierz and Braunbleierz). The phosphate was first distinguished chemically by M. H. Klaproth in 1784, [5][6] and it was named pyromorphite by J. F. L. Hausmann in 1813.[7][8] The name is derived from the Greek for pyr (fire) and morfe (form) due to its crystallization behavior after being melted.[2]
Contents 1 Properties and isomorphism2 Image gallery3 See also4 References5 External linksProperties and isomorphismThe color of the mineral is usually some bright shade of green, yellow or brown, and the luster is resinous. The hardness is 3.5 to 4, and the specific gravity 6.5 - 7.1. Owing to isomorphous replacement of the phosphorus by arsenic there may be a gradual passage from pyromorphite to mimetite. Varieties containing calcium isomorphously replacing lead are lower in density (specific gravity 5.9 - 6.5) and usually lighter in color; they bear the names polysphaerite (because of the globular form), miesite from Mies in Bohemia, nussierite from Nuizière, Chénelette, near Beaujeu, Rhône, France, and cherokine from Cherokee County in Georgia.
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