This was an 85 g, 427 ct piece of unheated cuprian or Paraíba-type tourmaline rough from Mozambique (figure 1). The stone was shown in the rough gem trading circuit of Chanthaburi near the end of May 2020. The GIA laboratory in Bangkok was able to do some limited testing on the stone, confirming that it was indeed a cuprian tourmaline (figure 2). Paraíba tourmalines were first discovered in Paraíba, Brazil in 1989 and caused quite a sensation in the gem world. For a time, these vivid-colored, copper-bearing tourmalines were only found in Brazil.
Paraíba Tourmaline Value, Price, and Jewelry Information Gem Society
Discovered in 1989, paraíba tourmalines are among the world's most prized gemstones. These rare gems are renowned for showing intense blue colors. 4 Minute Read Home Gemstones Paraíba Tourmaline Value, Price, and Jewelry Information By Donald Clark, CSM IMG, International Gem Society Paraíba tourmaline was first discovered by the assistants of Heitor Dimas Barbosa in the hills of the Federal Brazilian State of Paraíba. Barbosa had been diligently searching through the region since 1981. His fruitless efforts were encouraged by a tourmaline strike in 1986. 2). Of the several hundred kilograms of tourmaline rough mined to date in the Mavuco area, about 10% show blue-to-green Paraíba-like colors without heat treatment (M. Konate, pers. comm., 2007). The Cu-bearing tourmaline from this area may have been sold initially as Brazilian material (in var-ious countries around the world, including Brazil), This 3.28-carat Paraíba tourmaline's vivid violetish blue hue rivals the finest sapphires. Because of this tourmaline's rarity, its per-carat price is also likely to rival the price of fine sapphire. Color One of tourmaline's most sought-after and generally available colors is the pink/red variety known in the trade as rubellite.
Natural Paraiba Tourmaline Rough From Brazil Top Quality Etsy
Home Paraiba Tourmaline Paraiba Tourmaline Sort by: "AGL Certified" Paraiba Tourmaline 1.45 Carats $29,000.00 $35,000.00 "GIA Certified" Paraiba Tourmaline 2.02 Carats $4,848.00 $6,060.00 "GIA Certified " Paraiba Tourmaline 6.44 Carats $25,760.00 Paraiba Tourmaline 10.14 Carats $9,126.00 $10,140.00 "GIA Certified" Paraiba Tourmaline 7.77 Carats The answer is copper. Copper Bearing Tourmalines Copper Shaving The color in tourmaline gemstones comes from a mix of manganese, chrome, iron, and vanadium. But trace elements of copper (specifically copper mixed with manganese) are what give paraibas their signature blue glow. Paraíba is a variety of elbaite tourmaline with copper content. The name comes from the Brazilian state of Paraíba, the original source. Subsequent discoveries of similar stones in Nigeria and Mozambique caused some controversy over the use of this name. The gem community largely accepts paraíba as a variety name. Paraiba Tourmaline. Their colour is often referred to as 'electric' or 'neon'. The aura of these treasures of Nature is both fresh and spirited at the same time. These cupriferous tourmalines from the Mina da Batalha in the Federal Brazilian State of Paraiba are small, rare and precious. Their spirited turquoise to green colours are such as are.
Paraíba Tourmaline Buying Guide International Gem Society
Paraiba Tourmaline Rough (1 - 60 of 629 results) Price ($) Shipping Recommended Sort by: Relevancy AAA 10x8 MM Flawless Green Paraiba Tourmaline Loose Oval Gemstone Cut, Paraiba Tourmaline Ring And Valentine's Jewelry Making Gemstone Cut (1.1k) $37.87 $126.24 (70% off) FREE shipping Paraiba tourmaline is an extremely rare brightly coloured copper-bearing/cuprian elbaite that shows intense blues and greens. It was discovered by an avid gem prospector named Heitor Dimas Barbosa in the late 1980s in the Batalha mine, in the state of Paraíba, Brazil, hence the name.. The rough stone glowed with alluring neon, an effect.
The key 300-hectare paraiba tourmaline mine is near Nampula, in the Alto Lingonha area (red dot #1 on the map). To see Mozambique in the context of African mineral localities, see this map.. Several hundred kilos of tourmaline rough have been extracted from this area, but only about ten percent actually exhibits the neon glow of paraiba. This 2.87 ct Paraíba tourmaline is from Brazil. Photo by Robert Weldon/GIA; courtesy of David Bindra, B&B Fine Gems. INTRODUCTION Copper-bearing gem tourmaline—recognizable by its vivid neon blue to green color—has been one of the most popular colored gemstones on the market for the nearly three decades since its debut (figures 1 and 2).
Paraiba tourmalines an electric story that stretches all the way from
Well, simply put, as with all gemstones; "The 4 C's" are the main factors which guide quality in Tourmaline : COLOR | CLARITY | CUT | CARAT WEIGHT We will look at these in detail one by one. Judging Tourmaline Color rough fragments per year that typically weigh less than 1 ct each. Most small pieces of rough "Paraíba" tourmaline in the Japanese market are from the Mulungu mine (M. Mizumura, pers. comm., 2005). The Alto dos Quintos mine is another source of "PARAÍBA"-TYPE TOURMALINE GEMS & GEMOLOGY SPRING 2006 5 Figure 1. Copper-bearing tourmaline.
