ankerite

Name:

ankerite

A photo of the mineral ankerite

Class:

Carbonates

Chemistry:

CaFe(CO3)2 calcium iron carbonate

Color(s):

clear, white, gray, yellow-brown

Hardness:

3.5 - 4

SpecGrav:

2.9 - 3.8

Fracture:

uneven

Cleavage:

complete

Crystal:

Hexagonal (often rhombohedral or trigonal)

Envronment:

in mineral veins often associated with sulfides

Association:

calcite, siderite, quartz, dolomite, galena

Locals:

| Hungary | England | South Dakota, USA ||

Misc:

Soluble with effervescence in dilute HCl, occasional yellowish to reddish fluorescence.

Photos
& Locals:

1.) Homestake Mine, South Dakota
2.) Homestake Mine, South Dakota
3.) Eagle Mine, Gilman, Colo.

4.) Eagle Mine, Gilman, Colo.
5.) Eagle Mine, Gilman, Colo.
6.) Eagle Mine, Gilman, Colo.

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Name:	ankerite
Class:	Carbonates
Chemistry:	CaFe(CO3)2 calcium iron carbonate
Color(s):	clear, white, gray, yellow-brown
Hardness:	3.5 - 4	SpecGrav:	2.9 - 3.8
Fracture:	uneven	Cleavage:	complete
Crystal:	Hexagonal (often rhombohedral or trigonal)
Envronment:	in mineral veins often associated with sulfides
Association:	calcite, siderite, quartz, dolomite, galena
Locals:	\| Hungary \| England \| South Dakota, USA \|\|
Misc:	Soluble with effervescence in dilute HCl, occasional yellowish to reddish fluorescence.

	Photos & Locals:
		1.) Homestake Mine, South Dakota 2.) Homestake Mine, South Dakota 3.) Eagle Mine, Gilman, Colo.		4.) Eagle Mine, Gilman, Colo. 5.) Eagle Mine, Gilman, Colo. 6.) Eagle Mine, Gilman, Colo.

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