Minerals identify

Know how to recognize them

Zincite

Oxide mineral

Zincite is the mineral (Zn form is rare in nature; a notable exception to this is at the Franklin and Sterling Hill Mines , 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 associated with willemite.

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.

Both 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.

Identification

Color of mineral

Orange
Yellow
Red
Green
White

Mohs scale ( mineral hardness )

4

The streak

Orange

Density ( specific gravity )

2.013
2.029

Luster ( interacts light )

Adamantine
Resinous

Crystal ( diaphaneity )

Hexagonal