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Locations: |
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Madagascar, India, Tibet, USA |
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| Colors
Found: |
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| Family: |
Feldspar |
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Hardness: |
6.00 - 6.50 |
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Refractive Index: |
1.53 - 1.55 |
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Relative Density: |
2.62
- 2.65 |
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Radiating with the power of eternal light, Sunstone has been coveted
since antiquity for its ability to guide its wearer through the journey
of life. Sunstone is also known as Aventurine Feldspar or Heliolite,
from the Greek “helios” for sun and “lithos” for stone.

An ancient gem, Sunstone has allegedly been discovered in Viking burial
mounds. Among the Vikings, Sunstone was thought to aid navigation both
in reality and during ones journey to Valhalla and the afterlife.
Interestingly, the Sunstone referenced in Norse literature probably
refers to Iolite rather than the modern gem we call Sunstone.
Pope Clement VII (1478 - 1534) was reputed to have in his possession a
Sunstone with a golden spot that moved across the surface in accordance
with the apparent motion of the sun from sunrise to sunset.
Native Americans in Oregon, USA used Sunstone for trade and barter.
Oregon Sunstone was declared the official Gemstone of the State of
Oregon in 1987.
Crystal healers believe Sunstone to be useful for adding personal
insight and alleviating depression. Historically, Sunstone has been
linked with benevolent gods, luck and good fortune.

Sunstone is a member of the plagioclase Feldspar group of minerals and
is closely related to Moonstone and Labradorite. The name Feldspar comes
from the German “feldt spat”, meaning “field stone”. So named, this is
because when Feldspar weathers, it releases large amounts of plant
nutrients, such as potassium, which enrich soil.
Sunstone has a beautiful glittering sunlight effect as a result of its
tiny metallic inclusions. The copper or pyrite inclusions cause
sparkling flashes of light as millions of particles playfully interact
with light. While known to gemologists as “schiller” or “aventurescence”,
African miners call this feature “flowers”. Sunstones are nearly always
cut as cabochons to reflect this phenomenon but the deeper colors may
also be faceted to exhibit their superior luster.
Sunstone is formed and crystallized in lava flows. Sunstones range in
color from water clear through pale yellow, soft pink and red to deep
blue and green. Some of the deeper colored gems have bands of varying
color while others exhibit pleochroism, showing different colors when
viewed from different directions.
Sunstones are mined from the surface from partially decomposed rock
(with a pick and shovel) or from shallow pits and shafts dug to retrieve
the rough.
Sunstone is mined in the USA (Warner Valley, Oregon – the high copper
content of Oregon Sunstones gives them their unique bright red orange
colors), India, Canada, Tanzania, Tibet, Madagascar, Norway and Russia.
Interestingly, some Sunstones from Madagascar display asterism (also
known as the “star effect”, this is caused by minerals reflecting a star
of light back to the eye), which further accentuates Sunstone’s natural
sparkle.
One of the newest and most beautiful rare gems to be discovered, Tibetan
Sunstone (also known as Andesine, for the location of this minerals
discovery in the lava flows of the Andes Mountains, Bolivia in 1841) was
first unearthed in 2002 in central Tibet. Initially bumping into some
rough Tibetan Sunstone during a buying trip in east Africa, our gem
hunters were perplexed by its origin. While many incorrectly claim that
the Democratic Republic of Congo is the source of this gemstone, we know
better. Using our network of mining and gemstone contacts around the
globe, we were able to get to the bottom of this modern gem mystery.
Tibetan Sunstone is characterized by a swirling mix of coppery oranges,
honeys, ambers, lemons and limes with a beautiful glittering sunlight
effect caused by tiny copper inclusions. While the copper inclusions are
predominantly orange, they often disperse a fiery multitude of electric
colors. With such an attractive blend of shimmering colors, Tibetan
Sunstone has a unique appearance unlike any other gemstone.
Nevertheless, supply is erratic and very limited, making this beautiful
rare gemstone even more collectable.
Tibetan Sunstone is somewhat similar to Maasai Sunstone from Tanzania.
First found by a young Maasai man on tribal grazing lands near Arusha in
2000, Maasai Sunstone’s basic red orange color mimics the bright hues of
the Maasai people’s dress. Since the Maasai have found several of east
Africa's gem deposits (Tsavorite and Tanzanite), it is fitting that at
least one of their gem discoveries carries their tribal name.
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