Kyanite
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Item# 5KYAN09172132
Kyanite Blades in matrix from Brazil

$48.00
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Kyanite forms bladed crystals. It is generally blue, but can also be green or gray. It has a glassy luster. Kyanite has a
unique physical feature in that it has two different hardnesses. When its hardness is measured across the crystal, it is 7;
when it is measured down the length of the crystal, it is 5. All other minerals have a single hardness no matter where it is
measured on the crystal.
Kyanite is the variant spelling of the original name of this mineral, Cyanite. The name was derived from the Greek word
kyanos meaning blue in reference to this mineral’s most common color. The name was given by Abraham Gottlob
Werner in 1789.
Sillmanite was named in honor of Professor Benjamin Silliman (1779-1864) who was the first professor of mineralogy
at Yale University (as well as professor of chemistry for a time). The name was given by G.T. Bowen in 1824.
Andalusite was named after Andalusia, a province in southern Spain, where this mineral is found. The name was given
by Jean Claude Delametherie in 1798.
There are substantial deposits of Kyanite in the United States. The most important deposits are in Idaho and the
Appalachian Mountain region in Eastern United States. Gneisses in Southern California also have significant Kyanite
resources. Presently, however, it is not economical to mine these deposits. Should economic conditions change, these
deposits may be worth mining. South Africa supplies most of the Andalusite imported for industrial consumption in the
United States. France and India also produce Andalusite and Kyanite, respectively. The most recent finds of Kyanite
have come from Brazil
Kyanite and its related minerals are used to make a variety of refractory materials. Refractory materials are those that
are resistant to very high temperatures. As a result, more than half of the Kyanite consumed is used in refractories for
the production of steel. Kyanite is also used to produce refractories for nonferrous (non-iron-bearing) metals. Some is
consumed to make refractories for glass and heat-resistant ceramics. Kyanite is also used to make spark plugs and is
used for non-refractory applications.
A very nice specimen of natural
sapphire blue Kyanite Blades just as
they are mined. Platy crystals of rich
blue kyanite formed in a matrix of white
quartz. The brilliant blue color varies in
intensity throughout. This specimen
was procured from a Brazilian Minerals
dealer at the July 2017 Franklin, NC
Show. It is from the Jequitinhonha
Valley, Minas Gerais, Brazil

This specimen weighs
19.1 oz or 1.2 lbs (544g)

and measures
7.1 x 2.25 x 1.8" (18 x 5.7 x 4.6cm)
Item# 6KYAN09171591
Kyanite Blades in matrix from Brazil

$42.00
A very nice specimen of natural
sapphire blue Kyanite Blades just as
they are mined. Platy crystals of rich
blue kyanite formed in a matrix of white
quartz. The brilliant blue color varies in
intensity throughout. This specimen
was procured from a Brazilian Minerals
dealer at the July 2017 Franklin, NC
Show. It is from the Jequitinhonha
Valley, Minas Gerais, Brazil

This specimen weighs
16.2 oz or 1.01 lbs (459g)

and measures
4.2 x 3.4 x 2.1" (10.8 x 8.7 x 5.4cm)
Item# 7KYAN09175090
Kyanite Blades in matrix from Brazil

$28.00
A very nice specimen of natural
sapphire blue Kyanite Blades just as
they are mined. Platy crystals of rich
blue kyanite formed in a matrix of
yellow quartz. The brilliant blue color
varies in intensity throughout. This
specimen was procured from a
Brazilian Minerals dealer at the July
2017 Franklin, NC Show. It is from the
Jequitinhonha Valley, Minas Gerais,
Brazil

This specimen weighs
7.5 oz or 0.47 lbs (213g)

and measures
3.9 x 2.1 x 1.4" (10.1 x 5.5 x 3.7cm)
Item# 8KYAN09175701
Kyanite Blades in matrix from Brazil

$34.00
A very nice specimen of natural
sapphire blue Kyanite Blades just as
they are mined. Platy crystals of rich
blue kyanite formed in a matrix of white
quartz. The brilliant blue color varies in
intensity throughout. This specimen
was procured from a Brazilian Minerals
dealer at the July 2017 Franklin, NC
Show. It is from the Jequitinhonha
Valley, Minas Gerais, Brazil

This specimen weighs
8.9 oz or 0.55 lbs (253g)

and measures
4.3 x 3.1 x 1.6" (11.1 x 7.9 x 4.3cm)
Item# 9KYAN09176180
Kyanite Blades in matrix from Brazil

$30.00
A very nice specimen of natural
sapphire blue Kyanite Blades just as
they are mined. Platy crystals of rich
blue kyanite formed in a matrix of
yellow-white quartz. The brilliant blue
color varies in intensity throughout.
This specimen was procured from a
Brazilian Minerals dealer at the July
2017 Franklin, NC Show. It is from the
Jequitinhonha Valley, Minas Gerais,
Brazil

This specimen weighs
6.7 oz or 0.42 lbs (192g)

and measures
4.7 x 1.9 x 1.1" (12 x 4.9 x 2.7cm)
Item# 10KYAN09175421
Kyanite Blades in matrix from Brazil

$39.00
A very nice specimen of natural
sapphire blue Kyanite Blades just as
they are mined. Platy crystals of rich
blue kyanite formed in a matrix of white
quartz. The brilliant blue color varies in
intensity throughout. This specimen
was procured from a Brazilian Minerals
dealer at the July 2017 Franklin, NC
Show. It is from the Jequitinhonha
Valley, Minas Gerais, Brazil

This specimen weighs
10.3 oz or 0.64 lbs (293g)

and measures
4.5 x 2.3 x 1.9" (11.5 x 5.9 x 4.3cm)
This specimen even has the beginning
formation of Black Kyanite on the
bottom side.