Minerals

GYPSUM through KAOLINITE

GYPSUM, M-325A. Utah. Fine to
medium grain, white to partly light buff,
somewhat porous massive (rarely crystalline).  (Same as rock gypsum

in Sedimentary Rock section.  

GYPSUM (SATIN SPAR), M-325B.
Morocco or Brazil. White, silky to glassy fibrous masses
from vein sections. 

 

GYPSUM variety ALABASTER, M-325C. 
Fine grained, white to pink alabaster.  

Used for carving.

 

GYPSUM "Rose", M-325D. 
Mexico.  Rosette spheres of tan gypsum "roses" tinged with white edges.  

 

HALITE, M-330.  Cubic cleavages. 

HALITE (ROCK SALT), M-330A. Utah.
Medium to coarse grain, reddish to lesser pink and some gray to colorless.

HEDENBERGITE,
M-335.  Nevada.
Light green coarse bladed masses. Check for sizes.

HEMATITE, M-340. 
Michigan and Brazil
Specular masses of 1-2 mm micaceous glittering
flakes with minor magnetite. 

HEMATITE (RED OCHER),
M- 340A. California.
Earthy bright red masses.  

HEMATITE, M-340C.  Michigan or Nevada.  Reddish gray metallic masses.

Slightly, to no attraction to magnet. Streak is brownish - red. Classic hematite.  

 

HEMATITE - BANDED IRON FORMATION M-340D.  

(Ironstone or Iron Formation) Michigan. Classic Lake Superior style 

iron formation.  Banded iron formation is an iron rich sedimentary rock consisting 

of alternating bands of iron-rich minerals (gray hematite with minor magnetite here) and chert, 

quartz, or other fine grained mineral (red jasper here). This is from the Ironwood 

Iron Formation in the Gogebic Range. 


HETEROSITE,
M-345.  South
Dakota. Dark brown masses. Check.

HORNBLENDE (Amphibole), M-350.  Canada. 
Vitreous dark green to black cleavages with occasional minor calcite or biotite. 

 
HYDROZINCITE, M-355. Nevada.
Rich masses and veins in rock. White, but
fluoresces a vivid blue in short wave UV light.

IDOCRASE, Vesuvianite, M-360. California. 

Yellow-green to olive, medium grained crystalline with minor associates.  

ILMENITE, M-365.  Canada.
Coarse grain, black metallic crystalline
masses. 
ILVAITE, M-370.  New Mexico.
Black masses with some pyrite and
hedenbergite. 


INDERITE, M-375. California.
Colorless to white columnar translucent crystalline masses.
Smaller pieces. 
JASPER, see under QUARTZ

JOHANNSENITE, M-380. Arizona.
Brown to black, bladed masses of
manganese clinopyroxene. Check.

KALINITE, M-385. Nevada.
White to colorless, transparent to
translucent crystalline masses. Check.

KAERSUTITE, M-390. Arizona.
5 to 20 mm black cleavage masses as
constituent of camptonite rock. 

KAOLINITE (KAOLIN), M-395. 
California or Georgia. Compact white earthy masses. Out of Georgia material.

 

KERNITE, M-398.  Crystalline blades or aggregates.  

 Check for other sizes.



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