-
Blue John (also
known as
Derbyshire Spar) is a semi-precious
mineral, a rare form of
fluorite with
bands of a purple-
blue or
yellowish colour. In the...
- a
mineral consisting of
strontium sulfate (SrSO4). The
mineral is
named for its
occasional delicate blue color.
Celestine and the
carbonate mineral strontianite...
-
Topaz is a
silicate mineral made of
aluminum and
fluorine with the
chemical formula Al2SiO4(F, OH)2. It is used as a
gemstone in
jewelry and
other adornments...
- salt, is a type of salt, the
mineral (natural) form of
sodium chloride (NaCl).
Halite forms isometric crystals. The
mineral is
typically colorless or white...
-
Azurite or
Azure spar: 14 is a soft, deep-
blue copper mineral produced by
weathering of
copper ore deposits.
During the
early 19th century, it was also...
-
Larimar is the
tradename for a rare
blue variety of the
silicate mineral pectolite found only in
Dominican Republic,
around the city of Barahona. Its coloration...
- In
geology and mineralogy, a
mineral or
mineral species is,
broadly speaking, a
solid substance with a
fairly well-defined
chemical composition and a specific...
-
Fluorite (also
called fluorspar) is the
mineral form of
calcium fluoride, CaF2. It
belongs to the
halide minerals. It
crystallizes in
isometric cubic habit...
-
Leaders of
states in the U.S.
which have
significant mineral deposits often create a
state mineral, rock,
stone or
gemstone to
promote interest in their...
-
vivianite is colorless, but the
mineral oxidizes very easily,
changing the color, and it is
usually found as deep
blue to deep
bluish green prismatic to...
