The most expensive color varieties are vivid Red Spinel, vivid Pink Spinel, followed by Cobalt Blue Spinel (Sri Lanka), Flame Spinel (orange). B lue spinels are mined in Sri Lanka, Tanzania, Myanm ar, Pa kistan, and Vietna m (Shi gley a nd. Though two tips are damaged, it has very little edge wear and good surface luster. Nalin Danushka Leave a Comment on Natural Red Spinel Rough Stone from Vietnam Posted in Gem Hunting Travels, Gem Mining, Stories. In the last decade, the discovery of spinel deposits in Vietnam, Tanzania and northern Burma's (Myanmar) Namya region took the gem world by surprise with the production of incredibly beautiful colours such as the vibrant pinkish-red spinel from Namya. It is the most desirable color and is rarely found in today's market at affordable prices. Although Spinel is most famous for its red variety, it is also found in other colors such as green, blue, purple, brown and black. Signup and get a Voucher worth $250. Extremely Rare ! Orange Spinel, 4.21 ct. Volcanic reddish orange. Luc Yen's capital of Yen The (22°6′38.84″ N, 104°45′57.80″ E) is a five- or six-hour drive from Hanoi on a 160 km expanse of good road. Yes, it was marked "cobalt spinel" and "Vietnam" but nothing registered except the intense electric blue color that blew everything else away io. Picture by Irzhi Korn Noble spinel is characterized by a variety of colours (Fig. Cobalt Blue spinels from Luc Yen, Vietnam come in two types of blue. Buy online from $444 to $37,980 on ppgems.com. Nevertheless, these minerals are chemically distinct. From: Le Comptoir Géologique. Joined Jun 30, 2014 Messages 2,030. but, It was hard to find like this bright color Red Spinel with low Iron content. Free shipping. This wonderful specimen we were able to obtain on our trip to the mine in Vietnam last year, believe me, (or check the net) these are not easy to come by, particularly in any size above very small! The most high-quality cobalt spinel is currently produced in Vietnam. Most blue spinels are deep in color tending towards gray, and some with a violet tinge. These smurf-blue deposits owe their rare coloration to cobalt that joined the minerals as the gemstone was forming. Finds of cobalt blue spinel in Lục Yên, Vietnam. Besides red, hot pink (from Tanzania's Mahenge mine) and blue, other popular colors include orange, bluish-green, lavender, purple, paler pinks, grey, black, and unusual mixtures of different hues. CERTIFIED 2.08 CTS SPINEL RICH COBALT BLUE [STS975](12041803) Natural Cobalt Spinel Sri Lanka - Danu Group; Srilankan Untreated Certified Cobalt Blue Spinel 5.32 Ct . Sorting. "Baffin Island is geologically similar to the Himalayas, where some of the world's finest gems have been found," said . Rubies as well as spinels were first . This study characterizes the origin and gemological properties of these spinels, especially the cause of their unusually bright color, which is directly related to their value. Together with identifying impurities and their valence, we have taken into account the site of some impurities in the MgAl2O4 spinel structure by using sensitive techniques, including Electron Microprobe Analysis (EMPA), UV-Vis-NIR, electron spin resonance . 7 7 4 S p Z o n J s 3 o J r e V D d C 3. The karst mountains of An Phú, near Luc Yen in Vietnam, is the world's only source of that very neon tone . Synthetic. Vietnamese Red Spinel Rough from Luc-Yen Mine. Other locations include Sri Lanka, Vietnam (known for producing cobalt blue Spinel), Cambodia and Thailand.Synthetic Spinel and ImitationsThere are synthetic Spinel available on the market which are created through the flame fusion process. $800 / $349/ct. AU $5,149.66 . According to their colour, the spinels are divided into red spinel ("ruby spinel" - blood red, "Ba-las" - pinkish red (Fig. Spinel is rarely treated or heated. The Luc Yen district of northern Vietnam is a very productive gem province and the leading source of vivid blue spinel. In reality the color is just a tinge lighter than pics indicate. Cobalt Spinel. Spinel. compositions of natural cobalt spinel samples also give the same order of magnitude of major, minor and trace element constitutes as the cobalt diffusion-treated ones (Table 1). Under the immersion microscope, a blue rim was noticed that was seen following the outline of the cut stone (Fig. 3.90 Classic Cobalt Blue Spinel, VVS, 3.08 Ct. Rare Cobalt Blue Natural Spinel Loose . In this paper, we present the main impurities in natural blue spinel from the Luc Yen mining area in Yen Bai province, Vietnam. Free postage. Baffin Island spinel, the researchers found, contains up to 500 parts-per-million of cobalt, which gives it a vivid blue color — a color comparable to the highly coveted material found in Vietnam and the Himalayas. . Soper River spinel occurrence, Kimmirut area. Khe Khi, Luc Yen, Vietnam Ref. Watch. Blue Cobalt Spinel || Luc Yen, Vietnam.Mixed lot of Cobalt Blue Spinel, some with distinct crystallisation. Such "cobalt" blue spinels are highly sought after by collectors. 24 items. A fine spinel of over two carats is an exquisite treasure to be enjoyed for a lifetime, and for many future . These are reference stones I use when sourcing for this material in cut or rough form and are amongst the finest colours to the best of my knowledge. Spinel Cobalt in Marble. Vietnam cobalt spinel cut stones for sale. Red spinel from Vietnam. Spectrum : Red / Pink Spinel: Fine, fluorescent lines between 650nm and 700nm (known as Orange Pipe spectrum, best visible with blue filter), broad band centered at 540nm, other lines at 640nm and 470nm may be seen. Spinels have a wide range of color: Red, Pink, Orange "Flame", Blue, Purple, Violet, Grey, Metallic, Green, almost Colorless, Black, etc. Such a big difference in price between cobalt blue spinel and gamespydaily is often the cause of speculation . The intense pinks and reds are caused by traces of chromium, the same element that gives rubies their color. Follow us on Instagram. Check out our spinel vietnam selection for the very best in unique or custom, handmade pieces from our shops. Proceedings of the International Symposia on Geoscience resources and Environments of Asian Terrains (GREAT 2008), 4th IGCP 516, and 5th APSEG . Synthetic. Free shipping. Unfortunately Luc Yen produces only little stones in this color - a 0,25 ct would be large. Free returns. Facet . Relevance. Amity, Orange County, New York, United States. 1; 2; First Prev 2 of 2 Go to page. Extremely rare cobalt spinel 0.51 carats. From: A Bijoux. In terms of clarity, spinel is often cleaner . Spinel is the magnesium-aluminum member of the larger spinel group of minerals with . The spinel usually occurs as a small octa-shaped crystal. 4), the range of colours depends on the composition of chromophores. "There's . Go. November 13 and 14; SAN FRANCISCO, CALIFORNIA: Show and sale; Pacific Crystal Guild; Fort Mason Center; Sat. High Quality Natural Gemstone Rough Wire Wrapping/Jewelry. Spinel Cobalt in Marble. The reason is, this gemstone is one of the most incredible and priceless objects of Nature . 77502) is a black mixed oxide of Iron (II, III), Cobalt (II) and Chrome (III) with chemical formula (Co,Fe)(Fe,Cr) 2 O 4 and a spinel structure. 307a) and this suggested a diffusion-treatment. From: Le Comptoir Géologique. A continuum of blue between these two extremes can be found from this origin, as well .
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