Zincite
Zincite is an oxide mineral recognized among collectors for its crystal form and distribution.
Zincite is a zinc oxide famous for the orange-red crystals of the Franklin–Sterling Hill deposit in New Jersey, one of its very few natural sources.
About Zinciteextended article
Zincite (ZnO) is a zinc oxide, an ore of zinc and a striking collector species for its deep red-orange to orange-yellow colour.
The Franklin connection
Natural crystallised zincite is a great rarity, found principally at Franklin and Sterling Hill, New Jersey, with franklinite and willemite in the classic zinc ore.
What collectors look for
Red-orange zincite in the Franklin assemblage is the prize; sharp natural crystals are rare and highly valued.
About Zincite
Zincite is an oxide mineral in the wurtzite group and has the chemical formula (Zn,Mn)O. It crystallizes in the hexagonal system and holds a steady position among oxide species. Its combination of structural character and global distribution make it a recognized species in both systematic and aesthetic collections.
Identification & care
Zincite typically forms hemimorphic pyramidal crystals; also massive, granular, foliated. Its color is typically deep red to orange-red, yellow-orange and color from mn2+. The luster is sub-adamantine, resinous, the streak is orange-yellow, and specimens range from transparent to translucent. The cleavage is perfect {1010}. The fracture is conchoidal to uneven, which aids identification.
Collector context
How it forms
The geological setting for Zincite is typically metamorphosed zinc-manganese deposits (franklin-type ore bodies) — formed by high-grade metamorphism of original sedimentary zn-mn carbonate-oxide assemblages; extremely unusual geological environment. It is commonly found in association with franklinite, willemite, calcite, rhodonite, tephroite, zincochromite.
Why collectors care
Collectors pursue Zincite for the clarity of its crystal form and, in good material, saturated color that reads instantly across a display case. A well-terminated zincite on clean matrix photographs well, identifies quickly, and anchors a cabinet piece. Top Chinese specimens over the last two decades have reset the bar for what zincite looks like at collector grade.
What affects value
Value in Zincite is assessed, in typical order of weight, against: (1) locality provenance; (2) size relative to the species norm; (3) crystal form and termination sharpness; (4) color saturation and zoning; (5) transparency and internal clarity; (6) matrix quality and aesthetic balance; (7) condition (absence of damage, chips, or repair). Cleaning quality and verified locality documentation act as multipliers across the above.
Naming history
The name Zincite has a specific etymological and historical context — see Mindat's reference entry for provenance details. We have retained naming data at the record level; published prose is paraphrased from factual fields rather than copied from source.