This specimen weighs 25.01 grams. It measures 37 mm x 21 mm x 16 mm.

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Hi there, I am selling this Really gorgeous silver colored zincite specimen. This is a real gem! This particular specimen is from Poland. It is formed as a by product of smelting zinc in this one mine in Poland, that has now since been closed, so no more will ever come from there. The only other place that has zincite is New Jersey and the crystals are as small as dust, they can not be seen with out a microscope. So this location will be the only zincite with crystals large enough to see. If you have any questions, do not hesitate to ask me. Have fun bidding, thanks so much for visiting my auction and have a great day!

Below is some information from wikipedia about this mineral:
ZinciteFrom Wikipedia, the free encyclopediaNot to be confused with Zincate.ZinciteZincite from Arizona.jpgCrystal blades of zinciteGeneralCategory Oxide mineralFormula(repeating unit) (Zn,Mn)OStrunz classification 4.AB.20Dana classification 04.02.02.01Crystal system HexagonalCrystal class Dihexagonal pyramidal (6mm)H-M symbol: (6mm)Space group P63mcIdentificationColor Yellow-orange to deep red, rarely yellow, green, colorlessCrystal habit Disseminated – occurs in small, distinct particles dispersed in matrix.Twinning On {0001}Cleavage On {1010}, perfect; parting on {0001}Fracture ConchoidalTenacity BrittleMohs scale hardness 4Luster Subadamantine to resinousStreak Yellowish orangeDiaphaneity Translucent, transparent in thin fragmentsSpecific gravity 5.64–5.68Optical properties Uniaxial (+)Refractive index nω = 2.013, nε = 2.029Birefringence δ = 0.016References [1][2]Zincite is the mineral form of zinc oxide (ZnO). Its crystal form is rare in nature; a notable exception to this is at the Franklin and Sterling Hill Mines in New Jersey, an area also famed for its many fluorescent minerals. It has a hexagonal crystal structure and a color that depends on the presence of impurities. The zincite found at the Franklin Furnace is red-colored, mostly due to iron and manganese dopants, and associated with willemite and franklinite.
Zincite crystals can be grown artificially, and synthetic zincite crystals are available as a by-product of zinc smelting. Synthetic crystals can be colorless or can range in color from dark red, orange, or yellow to light green.

Synthetic zincite crystalsBoth natural and synthetic zincite crystals are significant for their early use as semiconductor crystal detectors in the early development of crystal radios before the advent of vacuum tubes. As an early radio detector it was used in conjunction with another mineral, galena, and this device was known as the cat's-whisker detector.
See also[edit]List of mineralsOleg Losev