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Locations: |
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India, Madagascar,
Mexico |
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| Colors
Found: |
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Brown, green, grayish
white, pink, red, shades of blue/purple & yellow |
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| Family: |
Chalcedony |
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Hardness: |
6.50 - 7.00 |
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Refractive Index: |
1.54 |
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Relative Density: |
2.59
- 2.61 |
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The name comes from the Latin name for
Jasper “iaspis”, which probably also referred to the other types of
Chalcedony Quartz. Jasper is an opaque and fine grained variety of
Chalcedony Quartz. It is typically found in red, yellow, brown or green
colors and generally has spots.
Jasper is normally cut as cabochons and has traditionally been used as a
gemstone for jewelry such as brooches, earrings, necklaces, pendants,
intaglios (a gem carved in negative relief) and cameos (a gem carved in
relief).

Jasper was a favorite amulet gem in ancient times and is referenced in
Greek, Hebrew, Assyrian and Latin literature. For example, Jasper is one
of “the stones of fire” (Ezekiel 28:13-16) that were given to Moses at
the mountain of God and said to possess the power to summon angels.
Moses then decreed them mounted into a sacred breastplate for his
brother, the high priest Aaron (Exodus 28:15-30). In the New Testament
(Revelations 21:19), Jasper is one of the twelve gemstones set in the
foundations of the city walls of Jerusalem. As compiled by Andreas,
Bishop of Caesurae, one of the earliest writers to tie the Apostles with
the symbolism of the twelve gems of Jerusalem, Jasper was denoted for
the Apostle St. Peter.
In some native American cultures, Jasper is considered to be the
symbolic blood of the earth, and was thus thought to be one of the best
gems for connecting with the deep, stabilizing energies of the earth.
According to crystal healers, Jasper is an intensely protective gem,
acting to stabilize the aura and rid it of dysfunctional energy thereby
facilitating relaxation, contentment and compassion.

Quartz gemstones are commonly separated
into two groups based on the size of their individual crystals. The
macrocrystalline Quartz (large crystal) group includes many popular
gemstones such as Amethyst, Ametrine, Citrine and Green Amethyst (Prasiolite).
Cryptocrystalline Quartz includes species whose individual crystals are
too small to be easily distinguished. Apart from being a variety within
the group, Chalcedony is also a catch all term to describe
cryptocrystalline Quartz and includes Jasper as well as many other gems
that have been coveted since antiquity.
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