- color, one of the most
valuable and rare
stones in the
gemological world.
Melanite:
Black in
color due to
limited substitution of
titanium for iron. Also...
-
Borolanite is an
historical petrological name for a pyroxene-
melanite bearing nepheline syenite variety which contains nepheline-alkali
feldspar pseudomorphs...
- brown,
green or black. The
recognized varieties are
demantoid (green),
melanite (black), and
topazolite (yellow or green). The red-brown
translucent variety...
- nosean;
other minerals which make
their appearance with some
frequency are
melanite,
garnet and melilite. The
plutonic leucite-bearing
rocks are
leucite syenite...
- calcite,
titanite and schorlomite, a dark-brown
titaniferous variety of
melanite-garnet. This rock is the
plutonic and holo-crystalline
analogue of the...
-
Pyralspite Almandine Pyrope Spessartine Ugrandite Andradite Demantoid Melanite Topazolite Grossular Hessonite Hydrogrossular Tsavorite Uvarovite Almandine-pyrope...
-
Mariposite (variety of phengite/muscovite)
Meerschaum (variety of sepiolite)
Melanite (variety of andradite)
Menilite (variety of opal)
Milky quartz (a cloudy...
-
matrix of analcime,
sanidine and
alkalic pyroxene with
accessory titanite,
melanite and nepheline. It is a
leucocratic variety of
analcimite (a foidite). Blairmorite...
-
costly of the garnets, with
three of its varieties—topazolite (yellow),
melanite (black), and
demantoid (green)—sometimes seen in jewelry.
Demantoid (literally...
- sodium-rich pyroxene, biotite, titanite, iron oxides, apatite, fluorite,
melanite garnet, and zircon.
Cancrinite occurs in
several nepheline-syenites. A...
