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Purchase Gemstone Jewelry From Chordia Jewels

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At Chordia Jewels, we don't just craft Jewelry but a story, a legacy, a Jewelry narrative that goes along with you for your entire life and more. – PowerPoint PPT presentation

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Title: Purchase Gemstone Jewelry From Chordia Jewels


1
Amethyst
2
Amethyst Story
  • Amethyst is a violet variety of quartz. The name
    comes from the Koine Greek aµ???st?? amethystos
    from a- a-, "not" and µe??s?? (Ancient Greek)
    methysko / µe?? metho (Modern Greek),
    "intoxicate", a reference to the belief that the
    stone protected its owner from drunkenness. The
    ancient Greeks wore amethyst and carved drinking
    vessels from it in the belief that it would
    prevent intoxication

3
Structure
  • Amethyst is a purple variety of quartz (SiO2) and
    owes its violet color to irradiation, impurities
    of iron and in some cases other transition
    metals, and the presence of other trace elements,
    which result in complex crystal lattice
    substitutions. The hardness of the mineral is the
    same as quartz, thus making it suitable for use
    in jewelry.

4
Hue and Tone
  • Amethyst occurs in primary hues from a light
    lavender or pale violet, to a deep purple.
    Amethyst may exhibit one or both secondary hues,
    red and blue. High quality amethyst can be found
    in Siberia, Sri Lanka, Brazil, Uruguay, and the
    Far East. The ideal grade is called "Deep
    Siberian" and has a primary purple hue of around
    7580, with 1520 blue and (depending on the
    light source) red secondary hues. Rose de France
    is defined by its markedly light shade of the
    purple, reminiscent of a lavender/lilac shade.
    These pale colors were once considered
    undesirable but have recently become popular due
    to intensive marketing.
  • Green quartz is sometimes incorrectly called
    green amethyst, which is a misnomer and not an
    appropriate name for the material, the proper
    terminology being prasiolite. Other names for
    green quartz are vermarine or lime citrine.

5


Amethyst frequently shows color zoning, with the
most intense color typically found at the crystal
terminations. One aspect in the art of lapidary
involves correctly cutting the stone to place the
color in a way that makes the tone of the
finished gem homogeneous. Often, the fact that
sometimes only a thin surface layer of violet
color is present in the stone or that the color
is not homogeneous means that only a small
portion of the material is suitable for faceting.
The color of amethyst has been demonstrated to
result from substitution by irradiation of
trivalent iron (Fe3) for silicon in the
structure, in the presence of trace elements of
large ionic radius, and, to a certain extent, the
amethyst color can naturally result from
displacement of transition elements even if the
iron concentration is low. Natural amethyst is
dichroic in reddish violet and bluish violet, but
when heated, turns yellow-orange, yellow-brown,
or dark brownish and may resemble citrine, but
loses its dichroism, unlike genuine citrine. When
partially heated, amethyst can result in
ametrine.
6
History
  • Amethyst was used as a gemstone by the ancient
    Egyptians and was largely employed in antiquity
    for intaglio engraved gems.
  • The Greeks believed amethyst gems could prevent
    intoxication, while medieval European soldiers
    wore amethyst amulets as protection in battle in
    the belief that amethysts heal people and keep
    them cool-headed. Beads of amethyst were found in
    Anglo-Saxon graves in England. Anglican bishops
    wear an episcopal ring often set with an
    amethyst, an allusion to the description of the
    Apostles as "not drunk" at Pentecost in Acts
    215.
  • A large geode, or "amethyst-grotto", from near
    Santa Cruz in southern Brazil was presented at a
    1902 exhibition in Düsseldorf, Germany.

7
Geographic Distribution
  • Amethyst is found in many locations around the
    world. Between 2000 and 2010, the greatest
    production was from Marabá and Pau d'Arco, Pará,
    and the Paraná Basin, Rio Grande do Sul, Brazil
    Sandoval, Santa Cruz, Bolivia Artigas, Uruguay
    Kalomo, Zambia and Thunder Bay, Ontario. Lesser
    amounts are found in many other locations in
    Africa, Brazil, Spain, Argentina, Russia,
    Afghanistan, South Korea, Mexico, and the United
    States.
  • Amethyst is produced in abundance from the state
    of Rio Grande do Sul in Brazil where it occurs in
    large geodes within volcanic rocks. Many of the
    hollow agates of southwestern Brazil and Uruguay
    contain a crop of amethyst crystals in the
    interior. Artigas, Uruguay and neighboring
    Brazilian state Rio Grande do Sul are large world
    producers, with lesser quantities mined in Minas
    Gerais and Bahia states.

8
Amethyst is also found and mined in South Korea.
The large opencast amethyst vein at Maissau,
Lower Austria, was historically important, but is
no longer included among significant producers.
Much fine amethyst comes from Russia, especially
from near Mursinka in the Ekaterinburg district,
where it occurs in drusy cavities in granitic
rocks. Amethyst was historically mined in many
localities in south India, though these are no
longer significant producers. One of the largest
global amethyst producers is Zambia in southern
Africa with an annual production of about 1000
tons.


Amethyst occurs at many localities in the United
States. The most important production is at Four
Peaks, Gila and Maricopa Counties, Arizona, and
Jackson's Crossroads, Wilkes County, Georgia.
Smaller occurrences have been reported in the Red
Feather Lakes, near Fort Collins, Colorado
Amethyst Mountain, Texas Yellowstone National
Park Delaware County, Pennsylvania Haywood
County, North Carolina Deer Hill and Stow, Maine
and in the Lake Superior region of Minnesota,
Wisconsin and Michigan. Amethyst is relatively
common in the Canadian provinces of Ontario and
Nova Scotia. The largest amethyst mine in North
America is located in Thunder Bay, Ontario
9
Faceted amethyst


Emerald cut amethyst


Amethyst crystals from Mexico
10
Cultural History
11
Ancient Greece
  • The Greek word "amethystos" may be translated as
    "not drunken", from Greek a-, "not" methustos,
    "intoxicated". Amethyst was considered to be a
    strong antidote against drunkenness, which is why
    wine goblets were often carved from it. In his
    poem "L'Amethyste, ou les Amours de Bacchus et
    d'Amethyste" (Amethyst or the loves of Bacchus
    and Amethyste), the French poet Remy Belleau
    (15281577) invented a myth in which Bacchus, the
    god of intoxication, of wine, and grapes was
    pursuing a maiden named Amethyste, who refused
    his affections. Amethyste prayed to the gods to
    remain chaste, a prayer which the chaste goddess
    Diana answered, transforming her into a white
    stone. Humbled by Amethyste's desire to remain
    chaste, Bacchus poured wine over the stone as an
    offering, dyeing the crystals purple.
  • Variations of the story include that Dionysus had
    been insulted by a mortal and swore to slay the
    next mortal who crossed his path, creating fierce
    tigers to carry out his wrath. The mortal turned
    out to be a beautiful young woman, Amethystos,
    who was on her way to pay tribute to Artemis. Her
    life was spared by Artemis, who transformed the
    maiden into a statue of pure crystalline quartz
    to protect her from the brutal claws. Dionysus
    wept tears of wine in remorse for his action at
    the sight of the beautiful statue. The god's
    tears then stained the quartz purple.

12
Other Cultural Associations
  • Tibetans consider amethyst sacred to the Buddha
    and make prayer beads from it. Amethyst is
    considered the birthstone of February. In the
    Middle Ages, it was considered a symbol of
    royalty and used to decorate English regalia. In
    the Old World, amethyst was considered one of the
    Cardinal gems, in that it was one of the five
    gemstones considered precious above all others,
    until large deposits were found in Brazil.

13
Value
  • Up until the 18th century, amethyst was included
    in the cardinal, or most valuable, gemstones
    (along with diamond, sapphire, ruby, and
    emerald). However, since the discovery of
    extensive deposits in locations such as Brazil,
    it has lost most of its value.
  • Collectors look for depth of color, possibly with
    red flashes if cut conventionally. As amethyst is
    readily available in large structures the value
    of the gem is not primarily defined by carat
    weight this is different from most gemstones
    where the carat weight exponentially increases
    the value of the stone. The biggest factor in the
    value of amethyst is the color displayed.
  • The highest-grade amethyst (called "Deep
    Russian") is exceptionally rare and therefore,
    when one is found, its value is dependent on the
    demand of collectors. It is, however, still
    orders of magnitude cheaper than the
    highest-grade sapphires or rubies.

14
Color Of Amethyst Gemstone
  • 1. Amethyst Gemstone is very attractive gemstone
    because of purple color. Amethyst is the name of
    the color as like word Turquoise.
  • 2. Variety of shades of Amethyst Orchid and
    Lavender for light color, Reddish Purple or
    Violet Ish color.

15
Amethyst Crystal
  • Amethyst receiving at purple color during crystal
    growth when trace amount of iron are in corporate
    into a growing quartz crystal.
  • The intensity of purple color vary from crystal
    to crystal.
  • After the crystallization, gamma rays emitted by
    the radioactive material, and use iron to purple
    color.

16
Amethyst Crystal
17
Properties Of Amethyst Gemstone
  • 1. Amethyst is a powerful and protective
    gemstone.
  • 2. Amethyst boosts hormone production, tune the
    endocrine system and metabolism.
  • 3. Amethyst protects the wearer from all types of
    harm psychic attack and other health problem.

18
Care Of Amethyst Gem and Jewelry
  • Avoid prolonged to bright light.
  • Always cleaned amethyst jewelry with warm and
    sudsy water or use soft cloth.

19
Amethyst Treatment to Citrine and Prasiolite
  • . The color of Amethyst can be modified by
    heating.
  • . Yellow or Golden Quartz sold as Citrine.
  • . Natural heating can also change the color of
    Amethyst to pale green the name of the treatment
    is called Prasiolite.

20
CUT
  • Amethyst can be cut into a wide variety of
    shapes. As this is the case, you will be almost
    guaranteed to find a stone to fit your personal
    style. You will find these gemstones cut into
    standard shapes like rounds, pears, ovals, and
    cushions.
  • You will also find purple quartz cut into faceted
    patterns referred to as brilliant cuts. And, if
    you are exceptionally adventurous, it is possible
    to find this special stone cut into one-of-a-kind
    shapes.

21
CARAT
  • Carat weight is always of importance in the
    discussion of gemstones. This stunning gemstone
    is often chosen as a center stone in jewelry as
    the cost of an amethyst does not increase in cost
    as dramatically with size as many other
    gemstones. Like other semi-precious gemstones, a
    large amethyst will be noticeably more
    cost-effective than precious stones like
    diamonds, rubies, sapphires, and emeralds.

22
CLARITY
  • Although clarity can have an impact on the value
    of your amethyst, so long as inclusions are
    indistinguishable to the naked eye, they will not
    greatly reduce the value of your stone. Indeed,
    color is more important in determining the value
    of this particular gem than minor flaws. Even
    with minor undistinguishable flaws, an amethyst
    with good color will retain most of its value.

23
How is Amethyst Graded?
  • Whether you are born in the month of February or
    are just a fan of this engaging purple gemstone,
    you will want to understand how amethysts are
    graded for quality.
  • Amethysts gemstones typically fall under a AAAA
    to B grading system.

24

AAAA GRADING
  • It is extremely rare to find an amethyst with
    this rating. Only 1 of all amethysts can be
    expected to fall under this category. These
    stones will have no inclusions visible to the
    naked eye. Considered heirloom quality, these
    much sought after gemstones will have a
    distinctly dark purple hue.

25
AAA GRADING
  • You can expect to find only 10 of amethyst to
    fall into this category. These exceptional
    gemstones will have no visible flaws and a medium
    to dark purple color.

26
AA GRADING
  • Approximately 33 of amethyst on the market will
    fall into this category. You can expect to find
    slight inclusions in these medium purple
    gemstones.

27
A GRADING
  • Still considered good, these light purple
    amethysts can be expected to have slight to
    moderate inclusions.

28
B GRADING
  • There are also amethysts with a B grading, but we
    do not recommend B grade amethysts to be set in
    jewelry. They have obvious inclusions, and its
    color would have hues of grey and/or brown. B
    grade amethysts are usually chosen to be cut into
    cabochons, or beads. However, there are
    circumstances where it can be treated to have a
    richer purple color.

29
Color Chart Of all Grades
30
Get In Touch
  • Head Office
  • 404, Siddha Jewels,
  • Nathmalji Ka Katla,
  • Agra Road Jaipur 302003, Rajasthan, India
  • Contact No 91-141-4062734

31
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