22x33 Oval blue turquoise cabochon from Blue Diamond Mine, AZ
A.D. Leveridge Gauge: High Setting & Small Aperture Accessory (c.1965)
AGS Darkfield Microscope 1949
AGS Diamond Proportion Analyzer Black (c.1966)
AGS Diamond Proportion Analyzer Gray (c.1966)
AGS Shipley Diamond Colorimeter (c. 1960)
Beck London 10x 20x loupe with case 1940s
Beck Spectroscope No. 2447 (c. 1950s)
Culti Original Diamond Selector I
Diamond Proportion Analyzer (GEM Instruments Corporation, c. late 1966)
Dr. Hanneman Diamond Eye Reflectivity Meter (c.1978)
Dr. Hanneman's "Poor man's Chelsea Filter" 2000s
Erb & Gray “Jewel" Refractometer (c. 1960s)
Excel Diamond Sensor Diamond Tester 1980s
GAAJ/ Marumo Gemstone Specific Gravity Scale
GAGB Chelsea Colour Filter 1958
GAGB Chelsea Colour Filter 1970s
GAGB Chelsea Colour Filter 1990s
GAGB Chelsea Colour Filter Post-2001
GAGB Chelsea Coloured Filter 1934
GAGB Chelsea Coloured Filter Oct 1951
Gallery / Aerial Whispers in Blue
Gallery / Down the Rabbit Hole
Gallery / Eternal Flow of Yin and Yang
Gallery / Inkfall Over Quiet Hills
Gallery / Shocked Gobble
GEM Electronic Diatest 2000 (c.1970s-1980s)
Gem Instrument No. 415 Polariscope (White) c.1996
GEM Instruments Calcite Dichroscope #424/#424000 (c. 1966)
Gem Instruments Dichroscope (c.1960)
Gem Instruments Hot Point Model No. 508 (c. 1960s)
GEM Instruments Polariscope (c. 1960s)
GEM Portable Immersion Cell (c.1990)
Gem Report - GAAJ-ZENHOKYO Gemmological Association of All Japan
Gem Report - Central Gem Laboratory
Gem Report - Gemological Institute of America
Gem Report - IGI Japan
Gem Report - Imperial Appraisal Center
Gem Report - UGL Japan
Gem Report GAAJ 2
Gem-A Portable Polariscope (c.2020s)
Gem-A Spectroscope (c.2012)
Gemmological Association of Japan Refractometer (est.1955~70s)
Gemological Products GemPro Refractometer (c. 2000–2002)
GemologyPro D1 Calcite Dichroscope (c. 2008)
Gems and Gemologists August 1933
GIA Analyzing Gem Refractometer (c. 1949)
GIA Dichroscope (1970s-90s)
GIA Duplex I Refractometer (c. 1967)
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