[SG] TOURMALINE STONE -NATURAL 2.2CTS [S1453 ]

Item Information

Dimensions (mm) 11 x 8 x 4mm
Weight (carats) 2.2 carats

SEDAGEMS

TOURMALINE BIRTHSTONE FOR OCTOBER.

NATURAL UN HEATED

MINED IN BRAZIL

GRADING VS

MOHS SCALE 7-7.5

WEIGHT 2.2CTS

SIZE 11X 8X 4MM

Tourmaline is a crystal silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline gem stones come in a wide variety of colors.Tourmaline has a variety of colors. Usually, iron-rich tourmalines are black to bluish-black to deep brown, while magnesium-rich varieties are brown to yellow, and lithium-rich tourmalines are almost any color: blue, green, red, yellow, pink etc. Rarely, it is colorless. Bi-colored and multicolored crystals are common, reflecting variations of fluid chemistry during crystallisation. Crystals may be green at one end and pink at the other, or green on the outside and pink inside: this type is called watermelon tourmaline. Some forms of tourmaline are dichroic, in that they change color when viewed from different directions.

                 
Type 1 Gemstones
The following gemstones are typically inclusion free, even minor inclusions detract from their value.
Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon
                                                                       
IFInternally flawless under extreme magnification (Very rare)
FFlawless
VVSMinute inclusions under 10x; invisible to the unaided eye
VSMinor inclusions under 10x; usually invisible to the unaided eye
SI1Noticeable inclusions under 10x; usually visible to the unaided eye
SI2Noticeable inclusions under 10x; usually quite visible to the unaided eye
I1prominent- moderate affect on appearance or durability
I2prominent - severe affect on appearance or durability
I3prominent- severe affect on beauty, transparency or durability
                 
Type 2 Gemstones
Gemstones that normally have small inclusions that do not detract from value.
Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline
                                                               
FFlawless
VVSMinor inclusions under 10x; usually invisible to the unaided eye
VSNoticeable inclusions under 10x; often invisible to the unaided eye
SI1Obvious inclusions under 10x; visible to the unaided eye
SI2Obvious inclusions under 10x; very apparent to the unaided eye
I1prominent - moderate affect on appearance or durability
I2prominent - severe affect on appearance or durability
I3prominent - severe affect on beauty, transparency or durability

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Pricing & Details

Auction ID 583910
Watchers 2 watching
Viewed 1,022 times
Starts 23rd Jun 2016 4:00am PDT

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