NATURAL Emerald Crystal Cluster Mineral Specimen BER (03/13/2011)...

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NATURAL Emerald Crystal Cluster Mineral Specimen BERYL

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NATURAL Emerald Crystal Cluster Mineral Specimen BERYL

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Sold Date: 03/13/2011
Channel: Online Auction
Source: eBay
Category: Natural History

Hi there. I am selling this AMAZING Emerald Beryl crystal mineral specimen.
This little guy weighs 5.62 grams which is 28.2 carats! It measures 29 mm by 17 mm by 11 mm and is very beautiful!
It is from Muzo, Boyaca , Columbia . The crystal on this is really nice.
LOOK BELOW FOR LARGE PHOTOS!
It is a very majestic piece! This piece is lustrous and perfect really.
I am selling off everything I own, and I am starting this out to raise money.
I found termites eating my walls, and I need cash to build them back up.
I am starting this out at .99 with no reserve, and I really hope I don't regret this, I don't even want to think about what I paid for it.
I hope I don't kick myself when this is over.
Please help me build new walls.
If youhave any questions, do not hesitate to ask me.
Have fun bidding, and know that I will ship this out the same day as the payment clears. Thanks so much for visiting my auction and have a great day:>)

The following is information about this from wikipedia:
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Emerald From Wikipedia, the free encyclopedia Jump to: navigation , search For other uses, see Emerald (disambiguation) . Emerald
Emerald crystal from Muzo, Colombia General Category Beryl variety Chemical formula Beryllium aluminium silicate with chromium , Be 3Al 2(SiO 3) 6::Cr Identification Color Green Crystal habit Hexagonal Crystals Crystal system Hexagonal Cleavage Poor Basal Cleavage (Seldom Visible) Fracture Conchoidal Mohs scale hardness 7.5 - 8.0 Luster Vitreous Streak White Specific gravity 2.70 - 2.78 Refractive index 1.576 - 1.582 Pleochroism Distinct, Blue-Green/Yellow-Green

Emeralds are a variety of the mineral beryl (Be 3Al 2(SiO 3) 6,) colored green by trace amounts of chromium and sometimes vanadium .[ 1] Beryl has a hardness of 7.5 - 8 on the 10 point Mohs scale of mineral hardness .[ 1] Most emeralds are highly included , so their toughness (resistance to breakage) is classified as generally poor. The word "emerald" comes from Latin smaragdus , via Greek smaragdos , its original source being a Semitic word izmargad or the Sanskrit word, marakata , meaning "emerald" or "green". [2 ]

Contents [ hide ] 1 Properties determining value 1.1 Color 1.2 Clarity 1.3 Treatments 2 Emerald localities 3 Synthetic emerald 4 Emerald in different cultures, and emerald lore 5 See also 6 Gallery 7 Notes 8 References 9 External links Properties determining value Cut emeralds

Emeralds, like all colored gemstones , are graded using four basic parameters, the four Cs of Connoisseurship; Color , Cut , Clarity and Crystal . The last C, crystal is simply used as a synonym that begins with C for transparency or what gemologists call diaphaneity . Prior to the 20th Century jewelers used the term water as in "a gem of the finest water" [3 ] to express the combination of two qualities, color and crystal. Normally, in the grading of colored gemstones, color is by far the most important criterion. However, in the grading of emerald, crystal is considered a close second. Both are necessary conditions. A fine emerald must possess not only a pure verdant green hue as described below, but also a high degree of transparency to be considered a top gem. [4 ]

Color

Scientifically speaking, color is divided into three components: hue , saturation and tone . Yellow and blue, the hues found adjacent to green on the spectral color wheel, are the normal secondary hues found in emerald. Emeralds occur in hues ranging from yellowish green to bluish green. The primary hue must, of course, be green. Only gems that are medium to dark in tone are considered emerald. Light toned gems are known by the species name, green beryl . In addition, the hue must be bright (vivid). Gray is the normal saturation modifier or mask found in emerald. A grayish

Clarity From the collection at the National Museum of Natural History

Emerald tends to h...