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SEDAGEMS

TOURMALINE BIRTHSTONE FOR OCTOBER.

NATURAL UN HEATED

MINED IN BRAZIL 

GRADING  VS

MOHS SCALE 7-7.5

WEIGHT 3.55CTS

SIZE13 X9 X5 MM

 

 

 

 

 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

IF	Internally flawless under extreme magnification (Very rare)
F	Flawless
VVS	Minute inclusions under 10x; invisible to the unaided eye
VS	Minor inclusions under 10x; usually invisible to the unaided eye
SI1	Noticeable inclusions under 10x; usually visible to the unaided eye
SI2	Noticeable inclusions under 10x; usually quite visible to the unaided eye
I1	prominent- moderate affect on appearance or durability
I2	prominent - severe affect on appearance or durability
I3	prominent- 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

F	Flawless
VVS	Minor inclusions under 10x; usually invisible to the unaided eye
VS	Noticeable inclusions under 10x; often invisible to the unaided eye
SI1	Obvious inclusions under 10x; visible to the unaided eye
SI2	Obvious inclusions under 10x; very apparent to the unaided eye
I1	prominent - moderate affect on appearance or durability
I2	prominent - severe affect on appearance or durability
I3	prominent - severe affect on beauty, transparency or durability

 

 

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ONE ITEM
Our basic shipping /handling fee is $3.00 per item sent first class airmail.
FOUR ITEMS
We offer a combine shipping/handling of 4 items from the one site for $9-this is done automatically when you go to paypal.
EIGHT ITEMS
You must have 5 feed backs and contact us before bidding and we will send you a paypal request with a handling/shipping fee of $15
EIGHT TO 30 ITEMS
You must have 10 feedbacks to purchase larger numbers and contact us before bidding.We will send this parcel by courier express with a tracking number for $45
<>PLEASE NOTE .We have the following sites listed  below so if you pay insurance for one site we can send all the orders to gether so only pay insurance once. There is still the handling fee per item of $3.00

.At www.opalauctions.com we have the following sites
SEDAOPAL-,BOULDER MAGIC-PETERS OPAL-QUALITY OPALS-SEDA ROUGH OPAL,-VOLCANIC OPALS.
At www.gemrockauctions.com we have the following sites
SEDAGEMS-MINERALGEMWORLD-GEMS TO WEAR.

 

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