This index gives the first author (in parentheses), the issue, and the first page (plus “ff” for feature articles, to indicate numerous pages following) of the article in which the indexed subject occurs. For Gem News (GN), Gem Trade Lab Notes (GTLN), and Letters (Let) sections, inclusive pages are given for the subject item. The Author Index on page 424 provides the full title and the coauthors (if any) of the articles cited. The inclusive pages for each issue are: Spring (Sp) 1–78; Summer (Su) 79–164; Fall (F) 165–242; Winter (W) 243–328.

A

Afghanistan

color-change synthetic sapphire represented as natural from (GN)F97:227–228

emerald from Bactria (GN)W97:302–303

fluorescence zoning in (GN)W97:301; Raman spectroscopy of (GN)W97:300–301

from Canada, color-zoned (GN)Su97:144

Amethyst simulant

quartz, quench-crackled and dyed (GTLN)F97:216–217

Ancient gems

emerald from Bactria (GN)W97:302–303

emerald from Roman necropolis (GN)W97:303

Andradite

from Arizona (GN)Sp97:61

demantoid—from Namibia (GN)F97:222–223; from Russia (GN)F97:222

see also Garnet

Aquamarine

carved, with crystal faces (GN)Sp97:61

Mogul bead (GTLN)Sp97:58–59

with unheated color, as a carving (GTLN)W97:292

see also Beryl

Arizona, see United States

Assembled stones

beryl and green plastic (GTLN)Su97:136–137

beryl with opal-inset culet (GN)Sp97:67–68

diamond, “piggyback” (GN)Su97:143

opal inset into culet of various gems (GN)Sp97:67–68

synthetic spinel–synthetic ruby doublet (GTLN)Su97:139–140

Asterism

diffusion-induced, in sapphire (GN)W97:308–309

in feldspar (GTLN)Su97:137

Australia

corundum from (GN)W97:302–303

rhodonite from (GN)F97:225–227

Aventurescence

in quartz due to pyrite inclusions (GN)Sp97:65–66

in synthetic quartz (GN)Sp97:69

B

Benitoite

from San Benito County, California (Laurs)F97:166ff; 

errata (GN)W97:310

Beryl

Maxixe (treated-color), as a tanzanite simulant (GTLN)W97:293

in Saudi Arabia (GN)F97:221

see also Aquamarine, Assembled stones, Emerald

Beryl, synthetic

hydrothermal, red and purple (GN)Sp97:68–69

see also Emerald, synthetic

Biron synthetic emerald, see Emerald, synthetic

Bolivia

gems and ornamental stones from (GN)W97:304–305

Book reviews

Birthday Book of Diamonds (Van Pelt and Van Pelt) F97:233

Cameos in Context: The Benjamin Zucker Lectures, 1990 (Henig and Vickers) Su97:154

Classical Loop-in-Loop Chains and Their Derivatives (Stark and Smith) F97:234

Creative Variations in Jewelry Design (Galli, Rivière, and Li) W97:311

Diamond Exploration Techniques Emphasising Indicator Mineral Geochemistry and Canadian Examples (Fipke, Gurney, and Moore) Su97:155

Gemmologia Europa V––European Gemmologists on Rubies and Sapphires (Superchi) Su97:155

Gemstones of North America, Vol. III (Sinkankas) Su97:154–155

The National Gem Collection (Post) F97:234

An Overview of Production of Specific U.S. Gemstones (Austin) Su97:155

Ruby and Sapphire (Hughes) F97:233–234

Visual Optics: Diamond and Gem Identification Without Instruments––The Hodgkinson Method (Hodgkinson) W97:311

Brazil

historic yellow diamond from (GTLN) Sp97:54–55

C

California, see United States

Canada

amethyst from Thunder Bay, Ontario (GN)Su97:144

Care of gem materials

rhodochrosite jewelry (Knox)Su97:122ff

Cathodoluminescence

of yellow diamond (GN)W97:298–299

see also Luminescence

Cat’s-eye, see Chatoyancy

Cavity filling, see Filling, fracture or cavity

Chalcedony

chromium from Bolivia (GN)W97:304–305

etched (GTLN)Su97:134

“Challenge,” see Gems & Gemology

Chatoyancy

in chrysoberyl—from Brazil (GN)Sp97:61–62; radioactive (GN)F97:221–222

in emerald, faceted (GTLN)F97:214

in opal (GTLN)Sp97:59

in quartz (GTLN)Sp97:59

in synthetic emerald (GN)Su97:149–150

Chemical composition

of benitoite (Laurs)F97:166ff

of emeralds from Sandawana (Zwaan)Su97:80ff

of hydrothermal synthetic emeralds from China (Schmetzer)W97:276ff

of Bi-bearing tourmaline from Zambia (Johnson)F97:204ff

China

standards for jewelry industry issued by government (GN)F97:229–230

synthetic emerald from (Schmetzer)W97:276ff

Chrysoberyl

cat’s-eye—from Brazil (GN)Sp97:61–62; radioactive (GN)F97:221–222

from India (GN)W97:301–302

Chrysoberyl, synthetic

vanadium-bearing green (GN)Su97:148–149

Color, cause of

in Tairus hydrothermal synthetic sapphire (Thomas)F97:188ff

Colorado, see United States

Corundum

diamond inclusions in (GN)W97:299

origins of, from Australia and Southeast Asia (GN)W97:302–303

see also Ruby, Sapphire

D

Demantoid, see Andradite

Diamond

in Arkansas (GN)F97:220–221

assembled “piggyback” (GN)Su97:143

damaged—from wear (GTLN)Sp97:55–56, (GN)F97:220; by spontaneous fracture (GTLN)W97:295

fluorescence, impact on appearance of (Boyajian)W97:243, (Moses)W97:244ff

French conference on technology of (GN)Su97:142–143

grading standards issued by Chinese government (GN)F97:229–230

as inclusions in corundum (GN)W97:299

morphology of (GN)W97:300–301

opalescent (GN)Sp97:60

sales “pipeline” (GN)W97:299–300

thermal conductivity of (GTLN)W97:293–294, (Nassau)W97:260ff

see also Diamond, colored; Diamond, cuts and cutting of; Diamond, inclusions in; Diamond simulants; Diamond, synthetic; Diamond treatment; Instruments

Diamond, colored

bicolored pink and green (GTLN)Su97:135–136

black—cabochons (GTLN)F97:212; “pearls” (GN)Sp97:60–61

orange (GTLN)F97:213

pink, fracture-filled (GTLN)W97:294–295

yellow—with “additional” color (GTLN)Su97:134–135; from Brazil (GTLN)Sp97:54–55; cathodoluminescence of (GN)W97:298–299; from Colorado (GTLN)Sp97:54–55; treated color with green graining (GTLN)Su97:136

Diamond, cuts and cutting of

modern methods (Caspi)Su97:102ff

Diamond, inclusions in

pyrope and diopside in Yakutian crystals (GN)W97:300

Diamond simulants

synthetic moissanite (Nassau)W97:260ff

table of characteristics of various “colorless” simulants (Nassau)W97:260ff

topaz—with engraved “trigons” (GTLN)Sp97:57; fashioned to resemble diamond crystals (GTLN)F97:217–218

see also Gadolinium gallium garnet

Diamond, synthetic

French conference on technology of (GN)Su97:142–143

near-colorless, gemological properties of (Shigley)Sp97:42ff

thin films in jewelry (GN)Su97:143–144

see also Fluorescence, ultraviolet; Luminescence

Diamond treatment

filling of fractures––fracture-filled pink (GTLN)W97:294–295; identification challenges (GTLN)Sp97:56–57, F97:213

Diffusion treatment

of sapphires to induce asterism (GN)W97:308–309

Donors

“Thank You, Donors” Su97:153

Doublets, see Assembled stones

E

Editorials

“Carlsbad: A New Home for GIA and Gems & Gemology” (Keller)Su97:79

“The Dr. Edward J. Gübelin Most Valuable Article Award” (Keller)Sp97:1ff

The Impact of Fluorescence in Diamonds: A Different Research Perspective” (Boyajian)W97:243

“Symposium 1999: Meeting the Millennium” (Boyajian) F97:165

Electron microprobe analysis, see Chemical composition

Emerald

from Afghanistan (GN)W97:302–303

cat’s-eye, faceted (GTLN)F97:214

origin of––ancient Roman (GN)W97:303; Bactrian (GN)W97:302–303; as determined by isotopic composition (GN)W97:303

from Sandawana, Zimbabwe (Zwaan)Su97:80ff

trapiche, from Colombia, with double core (GN)Sp97:62

treated with new filler developed by Arthur Groom–Gematrat (GN)Su97:148

see also Beryl

Emerald simulant

beryl and green plastic assemblage (GTLN)Su97:136–137

quartz crystal with “matrix” (GN)Su97:150

Emerald, synthetic

Biron hydrothermal, identification of chrysoberyl crystals in (Schmetzer)W97:276ff

cat’s-eye, from Russia (GN)Su97:149–150

hydrothermal, from China (Schmetzer)W97:276ff

Errata

to “Benitoite from the New Idria District, San Benito County, California” (GN)W97:310

to “About the Cover” for the Spring 1997 issue—tourmaline specimen is from the Pala District (GN)Su97:152

Ethiopia

opal from Shewa (GN)F97:225

Ettringite group

sturmanite [?] from South Africa (GN)F97:223–224

Exploration––see Mining and Exploration

F

Faceting

of cultured pearls (GN)Su97:147

of neodymium pentaphosphate (GN)W97:307–308

see also Lapidary arts

Feldspar

bicolored labradorite from Finland (GN)Sp97:62–63

“rainbow moonstones” from Bihar State, India (GN)Su97:144–145

star (GTLN)Su97:137

sunstone from Oregon, with “watermelon” coloring (GN)Su97:145

Filling, fracture or cavity

of pink diamond (GTLN)W97:294–295

of quench-crackled synthetic ruby (GN)Su97:151

Finland

labradorite from Ylämaa (GN)Sp97:62–63

Fluorescence, ultraviolet

effect on appearance of diamond (Boyajian)W97:243; (Moses)W97:244ff

of near-colorless synthetic diamonds (Shigley)Sp97:46ff

zoned, in amber (GN)W97:301

Fossils

petrified palm wood (GN)Sp97:64

Fourier transform infrared spectrometer (FTIR), see Spectroscopy, infrared

Fracture filling, see Filling, fracture or cavity

G

Gadolinium gallium garnet (GGG)

from Russia (GN)F97:228

Garnet

bicolored grossular-andradite from Mali (GN)F97:224–225

heat treatment of (GN)W97:308

pyrope-almandine, identified by Raman spectroscopy (GTLN)W97:295–296

pyrope inclusions in diamond (GN)W97:300

see also Andradite

Gems & Gemology

ASAE Gold Circle Award presented to (GN)Sp97:70, W97:310

“Challenge” Sp97:71–72

list of “Challenge” winners and answers F97:231–232

“Dr. Edward J. Gübelin Most Valuable Article Award” (Keller)Sp97:1–2

see also Donors, Editorials

Geophysics

in gemstone exploration (Cook)Sp97:4ff

Georadar, see Geophysics

Glass

dichroic, imitating opal (GN)Sp97:69

as imitations or simulants of opal (GN)Sp97:69

with synthetic opal center (GN)Sp97:69

see also Assembled stones, Obsidian

Grossular-andradite, see Garnet

Growth structure analysis

of near-colorless synthetic diamond (Shigley)Sp97:42ff

of ruby from Nepal (Smith)Sp97:24ff

H

Heat treatment

of garnet (GN)W97:308

of sapphire, as indicated by discoid fractures (GTLN)Su97:140

see also Diffusion treatment

Hornbill ivory, see Ivory

I

Inclusions

in amber, with fluorescence (GN)W97:301

in benitoite (Laurs)F97:166ff

in emerald from Sandawana (Zwaan)Su97:80ff

fluid, in tanzanite (GN)Sp97:66

growth-induced features in single crystals (GN)W97:306–307

hematite [“rainbow”] in quartz from Yakutia (GN)Sp97:65

lazulite, as cause of color in blue quartz (GN)W97:303–304

pyrite in quartz from Brazil (GN)Sp97:65–66

in ruby from Nepal (Smith)Sp97:24ff

in hydrothermal synthetic emerald from China (Schmetzer)W97:276ff

in synthetic moissanite (Nassau)W97:260ff

in Tairus hydrothermal synthetic sapphire (Thomas)F97:188ff

see also Diamond, inclusions in; Diamond, synthetic; Filling, fracture or cavity; and specific host gem material

India

chrysoberyl from (GN)W97:301–302

“rainbow” moonstone from Bihar State (GN)Su97:144–145

Indonesia

cultured pearls from (GN)W97:304–305

Infrared spectroscopy, see Spectroscopy, infrared

Instruments

to separate diamond from synthetic moissanite, C3 Model 590 (Nassau)W97:260ff

see also Microscopy; Spectroscopy, infrared; Spectroscopy, Raman

International Gemmological Conference, 26th

held in Idar-Oberstein, Germany (GN)W97:298–299

Isotopic composition

of emeralds (GN)W97:303

Ivory

hornbill, carved (GTLN)Sp97:57–58

J

Jade

nomenclature standards issued by Chinese government (GN)F97:229–230

see also Jadeite, Nephrite

Jadeite

brown-and-white beads (GTLN)Su97:137–138

polymer impregnated—with green color (GTLN)Su97:138–139;

unusually transparent (GTLN)F97:214–215

see also Jade

Japan

“I pearls” from (GN)W97:306

Jet

from Russia (GN)Sp97:62

K

“Kauri gum”

from New Zealand (GN)W97:301

“Komatsu Flower” pearls, see Pearl, cultured

L

Labradorite, see Feldspar

Lapidary arts

carving—of musgravite (GN)Su97:145–146; of tanzanite (GN)Sp97:66

cutting and setting of rhodochrosite (Knox)Su97:122ff

diamond cutting and polishing, modern methods (Caspi)Su97:102ff

faceting of benitoite (Laurs)F97:166ff

faceting of “Komatsu Flower” pearls (GN)Su97:147

German award presented to Arthur Anderson (GN)F97:228–229

gold electroplating used to enhance inclusions in nephrite and silver ore (GN)Sp97:67

inclusions used creatively (GN)Su97:147

opal inset into culet of fashioned gemstones (GN)Sp97:67–68

quartz amphora containing gem crystals (GN)Sp97:70

“wasp-tail” citrine-smoky quartz (GN)Sp97:64–65

see also Faceting

Louisiana, see United States

Luminescence

to separate natural from synthetic near-colorless diamonds (Shigley)Sp97:42ff

see Cathodoluminescence; Fluorescence, ultraviolet