Gems and GemologyGems and Gemology
Home
Thursday, December 4, 2008Printer-Friendly Page
Service Center
Search
My GIA
Back Issue

Spring 1995, Volume 31, Issue 1

Click to Print
Gem Trade Lab Notes


ALEXANDRITE, with Pleochroic Twinned Growth Zones

DIAMOND

  • Untreated or Fracture-Filled?
  • Treated Old-Mine Cut
  • Triangular Inclusions in Diamond

SYNTHETIC DIAMOND, Treated-Color Red

EMERALD, with Unusual Flash-Effect Colors

JADEITE

  • Bleached and Impregnated, with Distinctive Surface Texture
  • Treated and Untreated Beads in One Necklace

Dyed Green NEPHRITE

Blister PEARL—Attached to Shell

SAPPHIRE, with Diffusion-Induced Star and Color

SYNTHETIC STAR SAPPHIRE with an Unusual Color

SPINEL, Natural with a Dendritic Inclusion

Appears on pages 52-58

Back to Table of Contents

Click Here to Buy This Issue or to Subscribe to Gems & Gemology

Home | About GIA | Ethics Helpline | Education | Laboratory | GIA Reports | Research | Instruments & Books | Alumni Association
Gems & Gemology | Employment at GIA | Careers Available | Newsroom | Publications | Library | Events & Trade Shows | Support GIA | GIA History | How to Buy a Diamond
Contact | Search | Site Map | Help
This page was last updated 08/15/05 09:08 AM
Use of this site signifies your agreement to its terms of use.
©2002 - 2008 Gemological Institute of America Inc.
GIA is a nonprofit 501(c)(3) organization.
All rights reserved.
World Headquarters and Robert Mouawad Campus
5345 Armada Drive, Carlsbad, California 92008
Tel: 760-603-4000