- C****iterite is a tin
oxide mineral, SnO2. It is
generally opaque, but it is
translucent in thin crystals. Its
luster and
multiple crystal faces produce...
- Selenite,
satin spar,
desert rose, and
gypsum flower are
crystal habit varieties of the
mineral gypsum. All
varieties of gypsum,
including selenite and...
- have been used for baryte,
including barytine, barytite, barytes,
heavy spar, tiff, and
blanc fixe.
Baryte occurs in many
depositional environments, and...
- most
common cleavage plane).
Habits include acute to
obtuse rhombohedra,
tabular habits, prisms, or
various scalenohedra.
Calcite exhibits several twinning...
-
Occurs frequently disseminated and
imbedded with
green Pyroxene in
Tabular spar,
sometimes it
forms considerable veins in that mineral.
Colour in m****...
- reddish-white, brownish-white;
colourless in
transmitted light Crystal habit Tabular crystals,
often with
curved faces, also columnar, stalactitic, granular...
-
trigonal crystal system and
shows a
variety of
crystal habits including tabular,
acute rhombohedral, pseudo-cubic and pseudo-cuboctahedral. It
occurs in...
- It is a type of
alkali feldspar, also
known as pot****ium
feldspar or K-
spar. The gem
known as
moonstone (see below) is
largely composed of orthoclase...
-
orthorhombic to
triclinic in a
single crystal.
Crystals are
typically thin
tabular,
flattened parallel to the
dominant cleavage and
elongated along the a...
- cerussite, is due to W.
Haidinger (1845). Miners'
names in
early use were lead-
spar and white-lead-ore.
Cerussite crystallizes in the
orthorhombic crystal system...
