search
  • Iscriviti
    Registrati
  • Solo per i clienti di lingua inglese

    Gratuito - Solo USA e Canada:
    1-800-464-1640

    Internazionale:
    +66-39303404

  • Change Language
  • USD

Indicolite Tourmaline

Blue Indicolite Tourmaline
Blue Indicolite Tourmaline

The tourmaline group includes a number of related species and varieties. They share a common crystal structure but have slightly different chemical compositions. Though tourmaline is a very popular gemstone, the different varieties distinguished by mineralogy are not well-known, even in the gemstone business. Both gem dealers and consumers are more familiar with a number of trade names for tourmaline.

Indicolite Tourmaline Crystal
Indicolite Tourmaline Crystal

The tourmaline varieties defined by mineralogy include: Buergerite and schorl, iron-containing tourmaline; dravite, which is magnesium tourmaline; elbaite, the most common tourmaline, containing lithium; liddicoatite, a type of calcium tourmaline; and tsilasite and uvite, which are manganese tourmaline.

The better-known trade names include rubellite, which is a ruby-red color; indicolite, referring to any shade of blue tourmaline; Paraiba, the neon blue-green tourmaline that is colored by traces of copper; verdelite, green tourmaline; watermelon, a tri-colored variety; and chrome tourmaline, intense green tourmaline colored by chromium.

Paraiba tourmaline has attracted a great deal of attention since its discovery in 1989. However, all blue tourmaline is quite rare, and high quality specimens are highly prized by collectors. Indicolite can range in color from light to deep blue. It is strongly pleochroic, meaning it shows different hues when viewed from different angles. Indicolite appears darker when viewed down the c-axis of the crystal and this must be taken into account when cutting. Poor cutting can result in a loss of transparency and brilliance, especially in darker specimens. Indicolite tourmaline is mainly found in small sizes and gems weighing over 1 carat are especially rare.

Although names like rubellite and indicolite are still used in the gem trade, they are becoming less frequent. It is becoming increasingly common to use color-specific names such as red tourmaline, blue tourmaline and so on, instead of the trade names. Even watermelon tourmaline is increasingly referred to as bi-color or tri-color tourmaline. This practice matches the test reports issued by well-known gemological labs who only use the trade names as secondary names, if they use them at all.

Indicolite or blue tourmaline is found in Brazil, Sri Lanka, the United States (Maine and California), Madagascar, Nigeria and Mozambique.

  • Prima Pubblicazione: January-25-2010
  • Ultima modifica: August-16-2017
  • © 2005-2019 GemSelect.com Tutti i diritti riservati.
    Qualsiasi riproduzione (testi o immagini) è strettamente proibita senza esplicita autorizzazione scritta da parte di GemSelect.com (SETT Company Ltd.).
Pinterest Board Names
More Shapes
Le pietre più conosciute
  • Zaffiro
  • Smeraldo
  • Rubino
  • Acquamarina
  • Zircone
  • Opale
  • Topazio
  • Tormalina
  • Granato
  • Ametista
  • Citrino
  • Tanzanite
Tutte le pietre preziose (142)
A B C D E F G H I K L M N O P Q R S T V Z
  • Acquamarina
  • Acquamarina effetto occhio di gatto
  • Agata
  • Agata dendritica
  • Agata di fuoco
  • Amazzonite
  • Ametista
  • Ametrine
  • Ammolite
  • Andalusite
  • Andesina Labradorite
  • Apatite
  • Apatite effetto occhio di gatto
  • Avventurina
  • Azzurrite druzy
  • Berillo
  • Berillo dorato
  • Calcedonio
  • Calcite
  • Cat's Eye Augite
  • Cat's Eye Opal
  • Charoite
  • Cianite
  • Citrino
  • Corallo
  • Corallo fossile
  • Cornerupina
  • Corniola
  • Crisoberillo
  • Crisocolla
  • Crisoprasio
  • Cromo diopside
  • Diamante
  • Diaspro
  • Diaspro cangiante
  • Diopside stellato
  • Druse emimorfite
  • Eliolite
  • Eliolite o pietra del sole
  • Eliolite o pietra del sole stellata
  • Ematite
  • Ematite o pietra del sangue
  • Enstatite
  • Fluorite
  • Fluorite che cambia colore
  • Gemme gatteggianti
  • Giada
  • Giadeite
  • Granato
  • Granato Malaya
  • Granato almandino
  • Granato cangiante
  • Granato del Mali
  • Granato demantoide
  • Granato di rodolite
  • Granato essonite
  • Granato grossularia
  • Granato piropo
  • Granato spessartite
  • Granato stellato
  • Granato tsavorite
  • Grandidierite
  • Hiddenite
  • Howlite
  • Idocrasio
  • Il geode di agata
  • Kunzite
  • Labradorite
  • Lapislazzulo
  • Larimar
  • Madreperla
  • Malachite
  • Matrice di occhio di tigre
  • Maw-Sit-Sit
  • Morganite
  • Nuummite
  • Occhio di gatto actinolite
  • Occhio di tigre
  • Occhio di tigre blu
  • Opale
  • Opale cioccolato
  • Opale doppietta
  • Opale macigno
  • Opale muschiato
  • Opale nera
  • Opale di fuoco
  • Opali in Matrice
  • Ossidiana
  • Ossidiana fiocco di neve
  • Peridoto
  • Perla
  • Pietersite
  • Pietra di Luna effetto occhio di gatto
  • Pietra di luna
  • Pietra di luna arcobaleno
  • Pietra di luna stellata
  • Pietre stellate
  • Pirite arcobaleno
  • Prehnite
  • Pyrite
  • Quartz With Marcasite
  • Quarzo
  • Quarzo citrino stellato
  • Quarzo effetto occhio di gatto
  • Quarzo fragola
  • Quarzo fumé
  • Quarzo mistico
  • Quarzo rosa
  • Quarzo rosa stellato
  • Quarzo rutilato
  • Rodocrosite
  • Rodonite
  • Rubino
  • Rubino in fuchsite
  • Rubino stellato
  • Rubino zoisite
  • Scapolite effetto occhio di gatto
  • Scolecite
  • Serafinite
  • Serpentinite
  • Sfalerite
  • Sfene
  • Sillimanite
  • Sillimanite effetto occhio di gatto
  • Smeraldo
  • Smithsonite
  • Sodalite
  • Spectrolite
  • Spinello
  • Sugilite
  • Tanzanite
  • Topazio
  • Topazio imperiale
  • Topazio mistico
  • Tormalina
  • Tormalina cromo
  • Turchese
  • Variscite
  • Zaffiro
  • Zaffiro cangiante
  • Zaffiro stellato
  • Zircone
Main Categories
  • Nuovi arrivi
  • Lotti di gemme
  • Gemme calibrate
  • Gemstones By Piece
  • Le pietre di massimo livello
  • Coppie
  • Gemme in cabochon
  • Drilled Gems, Briolettes and Beads
  • Le pietre portafortuna
  • Pietre incise
  • Gemme fantasia
  • Pietre stellate
  • Zaffiro non riscaldato
Solo per i clienti di lingua inglese

Gratuito - Solo USA e Canada:
1-800-464-1640

Internazionale:
+66-39303404

Risparmia denaro
Senza spese di spedizione per articoli aggiuntivi!
$8.90 spedizione in tutto il mondo

Update Translation
 
Current Value
New Value
GemSelect Gemstones
X Chiudi finestra
Colored Gemstones
X Chiudi finestra
Colored Gemstones
X Chiudi finestra
Colored Gemstones
Dimensioni e peso

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart