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Frequently Asked Questions (FAQ) GemSelect.com
Categories
• Shipping
• Payment
• Guarantee and Returns
• Gem Information
• GemSelect Website
• Accounts
Shipping
»  What countries do you ship to?
»  Is the shipping cost per item or per package?
»  Do I have to pay import duty or tax on gemstones I buy from GemSelect?
»  Can I have my order shipped to a different address than my billing address?
»  How can I track delivery of my order?
»  What happens if my order is lost in the mail?
»  See more detailed shipping information here
Payment
»  What forms of payment do you accept?
»  Do you accept payment by international money order?
»  Do you accept payment by wire transfer from my bank?
»  I don't have a credit card. How can I buy from you?
»  Do you accept payment by American Express?
»  Is my credit card information secure?
»  See more detailed payment information here
Guarantee and Returns
»  Do you provide certificates for your gems?
»  Do you provide appraisals of the gems you sell?
»  How do I return a gem to you?
»  During what period can I return a gem to you?
»  See more detailed payment information here
Gem Information
»  Are all your gems natural?
»  What is a calibrated gem?
»  I need a 7 x 5 mm gem for a standard setting. How much can a gem vary from 7 x 5 mm and still fit?
»  Where can I find a list of the standard calibrated sizes for gems?
»  Are there any kinds of gemstones that are always untreated?
»  Why do some gems show a color change?
»  Do you sell green amethyst?
»  How do I determine that a sapphire has not been heated?
»  Can you certify country of origin for your gemstones?
»  Which gems have the most brilliance and fire?
»  Do you have a printed catalogue? How do I get a copy?
»  What is the difference between jade and jadeite?
»  Is all red tourmaline called rubellite?
»  Can I buy two or more of a particular gem on your website?
»  Do you sell a gem called asparagus stone?
»  How do I tell if an amethyst or citrine is synthetic?
»  Do you sell a gem named cordierite?
»  Why are many cabochons unfinished on the bottom?
»  Why do so many gemstone names end in "ite"?
»  Is there a difference between brilliance and luster in gemstones?
»  Most of your gems are graded with letters like VVS and VS, but some are not. Why is that?
»  Is there such a thing as red sapphire?
»  Do diamond testing devices really work? Can they tell real from fake diamonds?
»  What is the most durable gemstone?
»  What is "color of streak"? Is it important?
»  What is "specific gravity" for gemstones? What does it measure?
»  How can I tell if a gem is "windowed"?
»  I recently purchased some gemstones and they were smaller than I expected. Can you help me?
»  What does "cabochon" mean?
»  Why are some gemstones cut in facets and others as cabochons?
»  What is the difference between an opal doublet and a normal opal?
»  Why do some gems have 3 measurement, like 6 x 4 x 3 mm, but some have only one or two measurements. Why is that?
»  Why are many tourmalines cut in long narrow bars? I don't see many other gems cut that way. Is it just the fashion now?
»  What is a concave cut? How is it produced?
»  What is "Portuguese cut"? How is it different from other cuts?
»  What is the significance of the refractive index of a gemstone? Is a higher value better?
»  What does "birefringence" refer to? I don't know if my gem has it.
»  Why are certain rubies referred to as having the color of "pigeon's blood"?
»  What are your best selling gemstones?
»  How many different kinds of gems are there in the world?
»  Which gemstones are copper-bearing?
»  What is mystic topaz?
»  What is the rarest gemstone?
»  How do gemstones get their color?
»  What is the scale used to measure the hardness of gemstones?
»  Where can I find a list of birthstones for the different months?
»  What is the difference between sapphire and tanzanite?
»  Do you buy gemstones?
»  See all of our gemstone information here
GemSelect Website
»  How do I search gems by color rather than gem name?
»  I tried to put some gems in my cart but I can't see them. What am I doing wrong?
»  How often do you add new gems to your website? What day should I look to see the new gems? Do you buy gems?
»  I bought some gems last month. How do I find all the detailed information about them now?
»  I added 4 gems to my cart and the next day 2 of them were gone. What happened?
»  Do you have an archive of newsletters? How do I access older newsletters?
»  See all of our content here
Accounts
»  Do I need to register to buy from GemSelect?
»  How do I subscribe for your newsletter?
»  I forgot my password and can't login. What can I do?
»  How do I change my account information?
»  Go to the account login page here

 
  • Première publication: 20 Février 2006
  • Dernière mise à jour: 09 Septembre 2019
  • © 2005-2021 GemSelect.com tous droits réservés.
    Reproduction (texte ou graphique), sans le consentement écrit de GemSelect.com (SETT Company Ltd) est strictement interdite.
Voir plus d'informations connexes ci-dessous
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Avis de Confidentialité © 2005-2021 GemSelect.com tous droits réservés.
Reproduction (texte ou graphique), sans le consentement écrit de GemSelect.com (SETT Company Ltd) est strictement interdite.
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Plus de formes
Pierres précieuses populaires
  		•  Saphir
  		• Émeraude
  		• Rubis
  		• Aigue marine
  		• Zircon
  		• Opale
  		• Topaze
  		• Tourmaline
  		• Grenat
  		• Améthyste
  		• Citrine
  		• Tanzanite
Toutes les pierres précieuses (142)
A B C D E F G H I J K L M N O P Q R S T V Z
    A Retour au sommet
  		•  Actinolite Œil de chat
  		• Agate
  		• Agate Géode
  		• Agate de Feu
  		• Aigue marine
  		• Amazonite
  		• Ammolite
  		• Améthyste
  		• Amétrine
  		• Andalousite
  		• Andésine Labradorite
  		• Apatite
  		• Aventurine
    • B Retour au sommet
  		•  Béryl doré
    • C Retour au sommet
  		•  Calcite
  		• Calcédoine
  		• Charoïte
  		• Chrysobéryl
  		• Chrysocolle
  		• Chrysoprase
  		• Citrine
  		• Clinohumite
  		• Corail
  		• Corail de Fossile
  		• Cornaline
    • D Retour au sommet
  		•  Dendritique Agate
  		• Diamant
  		• Diaspore Couleur Changeant
  		• Diopside Chrome
  		• Diopside Étoilé
  		• Disthène
  		• Druse d'améthyste
  		• Druzy Azurite
    • E Retour au sommet
  		•  Enstatite
    • F Retour au sommet
  		•  Flocon de Neige Obsidienne
  		• Fluorine
  		• Fluorite avec changement de couleur
    • G Retour au sommet
  		•  Grandidierite
  		• Grenat
  		• Grenat Almandin
  		• Grenat Couleur Changeant
  		• Grenat Démantoïde
  		• Grenat Grossulaire
  		• Grenat Hessonite
  		• Grenat Malaya
  		• Grenat Mali
  		• Grenat Pyrope
  		• Grenat Rhodolite
  		• Grenat Spessartite
  		• Grenat Tsavorite
  		• Grenat Étoilé
    • H Retour au sommet
  		•  Hiddénite
  		• Howlite
  		• Hématite
  		• Hémimorphite Druse
    • I Retour au sommet
  		•  Idocrase
  		• Iolite
    • J Retour au sommet
  		•  Jadéite
  		• Jaspe
  		• Jaspe Sanguin
    • K Retour au sommet
  		•  Kornerupine
  		• Kunzite
    • L Retour au sommet
  		•  Labradorite
  		• Lapis-lazuli
  		• Larimar
    • M Retour au sommet
  		•  Malachite
  		• Maw-Sit-Sit
  		• Morganite
    • N Retour au sommet
  		•  Nacre
  		• Nuummite
    • O Retour au sommet
  		•  Obsidienne
  		• Oeil de Chat Aigue-Marine
  		• Oeil de Chat Quartz
  		• Oeil de Tigre
  		• Oeil de Tigre Matrice
  		• Oeil de chat Apatite
  		• Oeil de chat Scapolite
  		• Oeil de chat Sillimanite
  		• Oeil de chat de la Pierre de Lune
  		• Onyx
  		• Opale
  		• Opale Boulder
  		• Opale Chocolat
  		• Opale Doublet
  		• Opale Noir
  		• Opale de Feu
  		• Opale en Matrice
  		• Opale hyalite
  		• Opale œil de chat
    • P Retour au sommet
  		•  Perle
  		• Pierre de Lune
  		• Pierre de Lune Arc en Ciel
  		• Pierre de Lune Étoilé
  		• Pierre de Soleil Étoilé
  		• Pierre de Soleil 
  		• Pierre précieuse étoiles
  		• Pierres précieuses Jade
  		• Pierres précieuses de couleur changeante
  		• Pierres précieuses oeil de chat
  		• Pietersite
  		• Prehnite
  		• Pyrite
  		• Pyrite Arc en Ciel
  		• Péridot
    • Q Retour au sommet
  		•  Quartz
  		• Quartz Citron étoilé
  		• Quartz Fraise
  		• Quartz Fumé
  		• Quartz Rose
  		• Quartz Rose Étoilé
  		• Quartz Rutile
  		• Quartz avec marcassite
    • R Retour au sommet
  		•  Rhodochrosite
  		• Rubellite Tourmaline
  		• Rubis
  		• Rubis en Fuchsite
  		• Rubis Étoilé
  		• Rubis-Zoisite
    • S Retour au sommet
  		•  Saphir
  		• Saphir couleur-Changeant
  		• Saphir Étoilé
  		• Scapolite
  		• Scolécite
  		• Seraphinite
  		• Serpentine
  		• Sillimanite
  		• Smithsonite
  		• Sodalite
  		• Spectrolite
  		• Sphalérite 
  		• Sphène
  		• Spinelle
    • T Retour au sommet
  		•  Tanzanite
  		• Topaze
  		• Topaze Imperiale
  		• Topaze Mystique
  		• Tourmaline
  		• Turquoise
    • V Retour au sommet
  		•  Variscite
    • Z Retour au sommet
  		•  Zircon
    • Retour au sommet
  		•  Émeraude
    • Retour au sommet
  		•  Œil de faucon
Catégories principales
  		•  Nouveautés
  		• Lots de pierres précieuses
  		• Pierres précieuses calibrées
  		• Pierres gemmes à la pièce
  		• Des pierres précieuses d'excellentes qualités
  		• Paires correspondant
  		• Pierres précieuses cabochon
  		• Gemmes, briolettes et perles percées
  		• Pierre de naissance
  		• Sculptures en pierres précieuses
  		• Pierres précieuses fantaisie
  		• Pierre précieuse étoiles
  		• Saphir non chauffé
Support à la clientèle en parlant d'anglaise seulement

Sans frais - USA et Canada seulement:
1-800-464-1640

International:
+66-39303404

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Taille et poids

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