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Grossular Garnets

Grossular is a calcium-aluminum species of the Garnet group of minerals. The name Grossular is derived from the
botanical name for the gooseberry, “grossularia”, in reference to the green Garnet of this composition that is found
in Siberia. Other shades include cinnamon brown (cinnamon stone variety), red, and yellow. Grossular Garnet is a
gemstone. Jewelers and some collectors tend to call these stones “Grossularite” which is a misnomer. Grossular
should not be called grossularite; grossularite was once a type of rock. We will still use the term Grossularite
because so many people still call them Grossularite as a type of Garnets.

Hessonite belongs to the Grossular Garnet group. While most Grossular Garnet is green, Hessonite typically has
an orange-brown color and is often called the “cinnamon stone”. Hessonite Garnet ranges in color from honey-
yellow to orange-brown and brown-red. When you view Hessonite under magnification waves and swirls of areas
of varying transparency are visible. These subtle inclusions are useful in distinguishing hessonite from other
gemstones of similar color, such as citrine, topaz and orange zircon.

Grossular Garnet is one of the six main members of the Garnet family, which also includes Pyrope, Almandine,
Spessartite, Uvarovite and Andradite. All varieties of Garnet share a common crystal structure but have varying
chemical compositions.
Grossularite is the term commonly used for the calcium-aluminum form of Garnet.
Grossularite can often be confused with Demantoid Garnet, but Demantoid is a variety of Andradite, a calcium-
iron Garnet. Though the Grossular Garnet species includes a variety of gemstones, grossularite typically refers to
the more common light to medium-green gem-quality form of Grossular Garnet. Other rarer varieties of Grossular
Garnet tend to trade under their own variety names.

Other Varieties of Grossular Garnet include;
-Tsavorite Garnet
which is an emerald-green Grossular Garnet colored by chromium or vanadium. It was named
after Tsavo National Park located on the border of Tanzania and Kenya, near Mount Kilimanjaro.
-Hessonite Garnet is an orange-brown Grossular variety, often referred to as the 'cinnamon stone' or 'Kaneel
stone'. Its color is owed to traces of manganese and iron.
-Hydrogrossular Garnet is a rare, green Grossular Garnet which is dense and opaque. Its color resembles that
of jade.
-Leuco Garnet is a rare white or colorless to near-colorless variety of Grossular Garnet. Most specimens will
exhibit a slight tinge of yellow, green or pink color.
Item # 1HESGAR09160003
Grossular Garnet var.
Hessonite from Vesper Peak

$69.00
Here's an excellent old stock display specimen of Hessonite Crystals glued to styrofoam (which was
normal during the 1970's) in a 2 x 2 x 1" (51 x 51 x 25mm) display case. This specimen is a
Grossularite Garnet var. Hessonite that has a vibrant reddish-orange color. The specimen is an
intergrown cluster of dodecahedra crystals. Some crystals show the classic cube face modification.
Most of the crystals are undamaged, with a few crystals showing extraction damage.  This rare
specimen is from Vesper Peak, Sultan Basin, Sultan District, Snohomish Co., Washington, USA

Vesper Peak (Elevation: 6214 ft / 1894 m) was a legendary locality that was difficult to reach, and
even more difficult to collect. Lots of difficult rock and snowpack climbing was required to reach the
large skarn area, located 300' southwest of the Vesper Peak Ridge Crest. This skarn area was a
noted locality for fine grossular during the 1970's. Very few large specimens have ever come out of
this area. We procured this specimen from a mineral dealer at the Grassy Creek Gem & Mineral
Show in Spruce Pine, North Carolina.  
The weight listed includes the display cube as well as the specimen.

This specimen weighs 1 oz (28g)
and measures 1 x 0.8x 0.47 inches (26 x 20 x 12mm)
Item # 1GROSGAR10165394
Grossular Garnets on matrix
from Jefferson Mine Asbestos
Canada

$295.00
The Grossular (Hessonite) Garnets from the Jeffrey Mine, Asbestos, Les Sources Regional County
Municipality, Estrie, Québec, Canada are world-famous, and some of the most sought-after
Grossular specimens for the species. These peach orange honey-colored crystals have superb
luster, and sharp crystal definition. More importantly, they have that rare internal brightness combined
with external glassy lustre that places this piece in the top percentiles for quality. This extraordinarily
beautiful piece is more gemmy and glassy than it appears in the photos.  Specimens of this caliber
were always rare, and now that the mine has closed, they are even harder to find.  The crystals are
extremely sharp and have a wet looking luster that is truly dazzling.  There appears to be no damage
to any of the crystals. A very special collector specimen!.

This specimen weighs 11.62 oz or 0.726 lb (330g)
and measures 3.1 x 2.9 x 2.1 inches (7.9 x 7.4 x 5.4cm)
Item # 2GROSGAR10167363
Grossular Garnets on matrix
from Jefferson Mine Asbestos
Canada

$95.00
The Grossular (Hessonite) Garnets from the Jeffrey Mine, Asbestos, Les Sources Regional
County Municipality, Estrie, Québec, Canada are world-famous, and some of the most
sought-after Grossular specimens for the species. These peach orange honey-colored crystals
have superb luster, and sharp crystal definition. More importantly, they have that rare internal
brightness combined with external glassy lustre that places this piece in the top percentiles for
quality. This extraordinarily beautiful piece h
as crystals up to 10mm and the crystals are on 3
out of 6 sides
.  Specimens of this caliber were always rare, and now that the mine has closed,
they are even harder to find.  The crystals are extremely sharp and have a wet looking luster
that is truly dazzling.  There i
s minor extraction damage. A very nice collector specimen!.

This specimen weighs 1 oz (31g) and measures 1.4 x 1.1 x 0.8 inches (3.5 x 2.9 x 2.2cm)
Item # 3GROSGAR10165532
Grossular Garnets on matrix
from Jefferson Mine Asbestos
Canada

$
69.00
The Grossular (Hessonite) Garnets from the Jeffrey Mine, Asbestos, Les Sources Regional County Municipality,
Estrie, Québec, Canada are world-famous, and some of the most sought-after Grossular specimens for the species.
These crystals have superb luster, and sharp crystal definition. T
his is a thin plate of matrix coated completely on one
side with gemmy cinnamon-orange grossular garnet crystals.
There are no missing crystals, there is minor extraction
damage. I
t has excellent striations that are classic for these garnets. This exceptional piece has crystals up to 9.8mm.
Specimens of this caliber were always rare, and now that the mine has closed, they are even harder to find.  The
crystals are extremely sharp and have a wet looking luster that is truly dazzling.  A h
ighly desirable collector specimen!.

This specimen weighs 0.24 oz (7g) and measures 1.1 x 0.97 x 0.31 inches (30 x 24 x 8mm)
Item # 4GROSGAR10165532
Grossular Garnets on matrix
from Jefferson Mine Asbestos
Canada

$4
9.00
The Grossular (Hessonite) Garnets from the Jeffrey Mine, Asbestos, Les Sources Regional County Municipality,
Estrie, Québec, Canada are world-famous, and some of the most sought-after Grossular specimens for the species.
These crystals have superb luster, and sharp crystal definition. This is a r
are plate of back matrix with crystals on one
side
and a pair of crystals on the back which is a grey matrix. There are no missing crystals, there is minor extraction
damage. This r
are piece has crystals up to 8.3mm. Specimens of this caliber were always rare, and now that the
mine has closed, they are even harder to find.  The crystals are extremely sharp and have a wet looking luster that is
truly dazzling.  A highly desirable collector specimen!.

This specimen weighs 0.24 oz (7g) and measures 1.1 x 0.65 x 0.61 inches (30 x 16.5 x 15.4mm)