Black metallic with a little disseminated
serpentine. Some pure enough for specific gravity tests.
Check for availability.
M-200. Arizona. Vivid blue and blue-green
crusts and masses with occasional quartz.
We have some smaller than class pack sizes available at lower price of
E-mail us. These are a very nice color, so smaller might work for you.
CHRYSOCOLLA, M-200A. Arizona.
Light sky blue to Robin's Egg blue, up to 50% associated rock.
Arizona. Veins in serpentine. Shows the fibrous nature of this
category of mineral.
CINNABAR, M-210. Nevada. Varies from
coatings and veinlets in and on rock to richer vugs on chert. Check for availability and sizes.
COAL, see in SEDIMENTARY ROCKS or Metamorphic
COLEMANITE, M-215. California.
Classic Boron material. Compact, fine sugary colemanite with some crystals.
sheets and dendritic fissure filling forms.
Little or no accompanying rock. No class packs available. Check on
COPPER, M-225A. Michigan. Tumbled
copper pieces from
the Keweenaw Peninsula. These pieces imitate those that
were naturally tumbled by glaciers.
CORUNDUM, M-220. Brown, gray and
bluish pieces of crystals.
RUBY variety CORUNDUM. M-220R. India. Purplish red
crystals showing hexagonal crystal
form and some with complete terminations.
1.25 to 1.75 by .75 inch crystals. Check.
DANBURITE. M- 235. Mexico.
DENDRITE, M-240. California.
Fern-like black manganese
oxide markings on white felsite. Faux fossil.
DIAMOND crystals/cubes. Educational-industrial
California, Coarse, crystalline, platy
masses usually with minor pyrophyllite
and/or andalusite. SL - Check.
DIATOMITE, (DIATOMACEOUS EARTH) see
Grayish green showing cleavage, parting
and occasional crystal faces.
Medium to fine grained white to grayish
crystalline masses .