您尚未参与本次拍卖。
23.70 CTS PURPLE TOURMALINE CABS-BRAZIL [ST7374 ]
- 存货单位
- 尺寸(毫米)
- x x mm
- 重量 (cts)
- Certified Gemstones
- 不
- 颜色
-
Member of International Coloured stone asociation commited to full disclouser of stone with money back guarantee
SEDAGEMS
TOURMALINE BIRTHSTONE FOR OCTOBER.
This is from a parcel of red bluish tinge rough we bought from a miner in Brazil from the parabia state -his mine produces Parabia tourmalines and cats eye material also. How ever when we cut the stones they appeared purple just like sugulite from South Africa. They do have some mica in the stone which gives it a interesting sparkle
NATURAL STONE UNTREATED
CABACHONED
MINED IN BRAZIL
MOHS SCALE 7-7.5
WEIGHT 23.70 CTS APP
SIZE 15x9x3 MM APP
Often, Nature conjures up tourmaline crystals from which gemstones with a particularly subtle multi-colouredness can be cut. You may well ask how that is possible. Tourmalines are mixed crystals of aluminium boron silicate with a complex and changing composition. It's a rather complex mineral group. Even minor changes in composition cause completely different colours. And that is how, on one and the same crystal, although it has grown quite naturally, completely different colours can occur, mostly in elongated columns one above the other, as if Nature had piled coloured rings one on top of the other. The crystals themselves can be as slim as a knitting-needle or as thick as a man's thigh. Some display coloration in which the shades vary only slightly, whilst others have starkly contrasting colours or zones of colour. Since tourmaline crystals have often grown in close proximity to one another, their cross-sections can also contain triangles which are closely joined together and gathered around a nucleus.
Stones with two or more different, well represented colours are particularly desirable. Depending on their shape and colour, these are known in the trade as bicoloured and multicoloured tourmalines respectively. Some of them also have rather interesting names: if, for example, the crystal is almost colourless and just black at both ends, it is referred to fondly as a 'Mohrenkopf', (a kind of cake popular in Germany). If it was red at one end it used to be called a 'Turk's head tourmaline'. Bicoloured tourmalines with a red centre which changes to green towards the edges are still referred to as 'watermelons'. If the colour zones of the crystal lie on top of one another, the Brazilians call it a 'papageios' or 'rainbow tourmaline'.
The main deposits of tourmalines are in Brazil and Africa. But Nature has also made Man a gift of this beautiful gemstone, always good for a surprise on account of its great diversity of colour, at other deposits, for example in Sri Lanka and Madagascar.
Pure individuality
Tourmalines are popular not only in jewellery but also as therapeutic stones. Thanks to their good energetic conductivity and their wealth of minerals, they are said to have an invigorating and fortifying effect. They are uncomplicated to work with and have excellent wearing qualities thanks to their good hardness. Beautiful multi-coloured tourmalines are particularly well suited to jewellery of an individual design, for each of these stones is different. More than that, indeed: practically each of the places where this gemstone is found - and it occurs all over the world - has its own colour variant. That does make life somewhat difficult for the cutter if he has to look for several stones of the same colour; in fact even two stones cut from the same raw crystal often differ in colour. But then that is the charm of the tourmaline, and especially that of the multi-coloured tourm
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 |
- 存货单位
- 尺寸(毫米)
- x x mm
- 重量 (cts)
- Certified Gemstones
- 不
- 颜色
-
Member of International Coloured stone asociation commited to full disclouser of stone with money back guarantee
SEDAGEMS
TOURMALINE BIRTHSTONE FOR OCTOBER.
This is from a parcel of red bluish tinge rough we bought from a miner in Brazil from the parabia state -his mine produces Parabia tourmalines and cats eye material also. How ever when we cut the stones they appeared purple just like sugulite from South Africa. They do have some mica in the stone which gives it a interesting sparkle
NATURAL STONE UNTREATED
CABACHONED
MINED IN BRAZIL
MOHS SCALE 7-7.5
WEIGHT 23.70 CTS APP
SIZE 15x9x3 MM APP
Often, Nature conjures up tourmaline crystals from which gemstones with a particularly subtle multi-colouredness can be cut. You may well ask how that is possible. Tourmalines are mixed crystals of aluminium boron silicate with a complex and changing composition. It's a rather complex mineral group. Even minor changes in composition cause completely different colours. And that is how, on one and the same crystal, although it has grown quite naturally, completely different colours can occur, mostly in elongated columns one above the other, as if Nature had piled coloured rings one on top of the other. The crystals themselves can be as slim as a knitting-needle or as thick as a man's thigh. Some display coloration in which the shades vary only slightly, whilst others have starkly contrasting colours or zones of colour. Since tourmaline crystals have often grown in close proximity to one another, their cross-sections can also contain triangles which are closely joined together and gathered around a nucleus.
Stones with two or more different, well represented colours are particularly desirable. Depending on their shape and colour, these are known in the trade as bicoloured and multicoloured tourmalines respectively. Some of them also have rather interesting names: if, for example, the crystal is almost colourless and just black at both ends, it is referred to fondly as a 'Mohrenkopf', (a kind of cake popular in Germany). If it was red at one end it used to be called a 'Turk's head tourmaline'. Bicoloured tourmalines with a red centre which changes to green towards the edges are still referred to as 'watermelons'. If the colour zones of the crystal lie on top of one another, the Brazilians call it a 'papageios' or 'rainbow tourmaline'.
The main deposits of tourmalines are in Brazil and Africa. But Nature has also made Man a gift of this beautiful gemstone, always good for a surprise on account of its great diversity of colour, at other deposits, for example in Sri Lanka and Madagascar.
Pure individuality
Tourmalines are popular not only in jewellery but also as therapeutic stones. Thanks to their good energetic conductivity and their wealth of minerals, they are said to have an invigorating and fortifying effect. They are uncomplicated to work with and have excellent wearing qualities thanks to their good hardness. Beautiful multi-coloured tourmalines are particularly well suited to jewellery of an individual design, for each of these stones is different. More than that, indeed: practically each of the places where this gemstone is found - and it occurs all over the world - has its own colour variant. That does make life somewhat difficult for the cutter if he has to look for several stones of the same colour; in fact even two stones cut from the same raw crystal often differ in colour. But then that is the charm of the tourmaline, and especially that of the multi-coloured tourm
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 |
运输商 | 运送至:国家 | 运送到世界其他地区 |
---|---|---|
FedEx | $12.00 / :几天天 | $39.00 / :几天天 |
:国家
FedEx 对包含 2 或更多商品的订单折扣为 $12.00
世界其他地区
FedEx 对包含 2 或更多商品的订单折扣为 $39.00
|
||
Registered Shipping | $9.00 / :几天天 | $16.00 / :几天天 |
:国家
Registered Shipping 对包含 2 或更多商品的订单折扣为 $9.00
世界其他地区
Registered Shipping 对包含 2 或更多商品的订单折扣为 $16.00
|
-
积极的
Paid and shipped - no feedback left after 100 days
-
积极的
fantastic. thank you
为什么用户出价高于自己?
出价时,这是用户愿意为产品出价的最高金额。然后,我们的系统将代表该用户自动出价,逐步提高出价以保持其作为最高出价者的地位,直至达到指定的最高价。
当出现“自动出价”图标时,表示我们的系统正在根据用户的最高出价主动为用户出价。这可能看起来好像用户出价高于自己,但这只是系统更新出价以反映用户最高限制的结果。