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The Industry @ a Glance
  • Tourmaline is a ring silicate material with a hexagonal crystal structure.
  • Tourmaline is a group name applied to the natural silicate minerals of the general
    formula XY3Z6(BO3)3Si6O18(OH)4 where X can be Na or Ca; Y can be substitutions of
    monovalent, divalent, trivalent or quadrivalent cations (Li, Mg, Mn, Fe, Al etc.); and Z
    can be occupied by Al, Mg, Cr, Fe3+, Fe2+, etc. [3,4]. F- or O2- can substitute for OH-.
  •  The commonest end-members of tourmaline are: buergerite, dravite, elbaite, liddicoatite,
    schorl and uvite
  • Brazil has been a major producer of Tourmaline for decades .
  • Zambia has been mining Tourmalines for many years - the most famous mine being Hofmeyer Mine near Nyimba
  • Madagascar and Mozambique also have fine Tourmaline deposits.
  • Tourmaline has become probably the best selling 'semi-precious' in recent years. This may partly be due to Paloma Picasso's signature range for Tiffany a few years ago
  • Green Tourmaline comes in a wide range of shades but the rare Emerald green variety is popularly known as Chrome Tourmaline, which relates to the traces of Chromium, which give this its unique colour
Companies , Processing & Products
  • Abrecht Jewellers News - Pink Tourmaline, Tourmaline (Rubellite) as an alternative to Ruby.
  • Gemstone Processing - Tourmalines are a Gem variety that have unique cutting requirements. Blue, Green, Parti-Colored Tourmalines.
  • Gem Stone - Processing in USA - Generalized Process Description, Process Waste Streams, Ancillary Hazardous Waste.
  • Estimation & Testing - Estimation and Testing of Standard Molar Thermodynamic Properties, crystal Chemistry of Tourmaline, Experimental Data, Estimation of Heat Capacity Functions.
  • Laboratory Services - Authenticity and Origin Determination of Natural Gemstones.
About Tourmaline & Tourmaline Deposits
  • Anisotropy in Tourmaline -  about tourmaline, Investigation of Hardness Anisotropy in Tourmaline
  • Buergerite - Structure & Chemistry
  • Geochemistry of Tourmaline - Geochemistry of Tourmalines   SEM Analysis
  • Fibrous Tourmaline - Complexly Zoned Fibrous Tourmaline, Cruzeiro Mine, Minas Gerais,
  • K-Tourmaline - Discovery of K-Tourmaline in Diamond-Bearing Quartz-Rich Rock from the Kokchetav Massif, Kazakhstan.
  • Lehigh County - Tourmaline in Quartz or Pegmatite Veins cutting the gneisses of Lehigh County
  • Baraboo Quartzite - Tourmaline-Bearing Quartz veins in the Baraboo Quartzite Wisconsin
  • Petrogenetic Indicator - Tourmaline as a Petrogenetic Indicator Mineral
  • Tors - Tourmaline on the Formation of Tors on the Dartmoor Granite
  • Schorl - Schorl is a Tourmaline Group Mineral.
  • Schorl Dravite Series - Tourmaline Structure and Chemistry, Linking Structure and Chemistry in the Schorl - Dravite Series
  • Geological Search - Compositional asymmetry in Replacement Tourmaline, Tourmaline Chemistry, Zoning and Replacement
  • Serra Do Itaberaba Group - Tourmaline from the Morro Da Pedra Preta Formation.
  • Tourmaline Crystal - Complex Zoned Tourmaline in the Diaspore Nodule from a Hydrothermal Kaolin Deposit, Experimental Methods and Results.
Mining Tourmaline
  • Excavation - Rockhounding in search of Earth's Treasures.
  • Exploration of Tourmaline - Application of Ground Penetrating Radar in the Exploration of Gem Tourmaline Pegmatites of Southern California.
  • Batalha Mine - Cuprian Elbaite from Batalha Mine.
  • Nambia - Project - Erongo Polymetallic Project Sampling
  • Mining Tourmaline - Application of Ground Penetrating Radar at Gem Pegmatitie Mine.
  • Liddicoatite Tourmaline - Liddicoatite Tourmaline from Madagascar,  Production and Distribution, Processing, Materials and Methods.
Information Sources & Articles of Interest
  • Uniaxial Minerals - Tourmaline a Uniaxial Mineral, Description - Color and Pleochroism, Features.
  • Alkaline deficiency Tourmaline - Description and Crystal Structure.
  • Tourmaline Crystal - Research and Collection News.
  • Indicator - Tourmaline as an Indicator for Provenance in Arkoma Foreland Basin Deltaic Deposits.
  • Mineral Sources - Non Metallic Minerals from Tourmaline.
  • Paraiba Tourmaline - The Rock Collector - NewsLetter, Praiba Tourmaline- Redefining Blue, World's most colorful Gemstone.
  • Usakos Tourmaline Mine - Recent Developments in the Mining and Mineral Industries.

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Industry Status & Markets
  • Bangkok Gems & Jewellery Magazine
  • Exporters - Jiaxin Minerals Processing Factory, Company Details, Products and Services, Other Companies.
  • Arkenstone - Mineral Collections - Collecting Fine Minerals from around the World, Online Services.
  • Industry - Kenya & Uganda - Production of Mineral Commodities.
  • Industry - Maine - Mineral Industry of Maine, Tourmaline is the Official state Mineral.
  • Source Guide - Standard Products and Services Listing, Dealers Selection Sample.
  • Indian Trade - Traders & Trade Leads 
  • Trade Leads - Tourmaline Buyer, Manufacturer, Supplier, Importers & Exporters
  • Export Company
  • Jagoda Gem Centre - Zambia
A - India Information:
  • Indian Tourmaline - Green and Blue Tourmaline in India, Different Shapes and their Prices.
  • Tourmaline Rocks - Tourmaline-Bearing Rocks in Singhbhum Shear Zone, Eastern India .

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