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Silvan Amberg
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Decks in this class (27)
Assignment 1 - Introduction
• Understand the basics of gem chemistry and physical structure.
• Describe the difference between organic and inorganic gems.
• Explain how gemologists classify gems.
• Understand how a gem’s availability affects the way it’s marketed.
• Understand the importance of honestly disclosing gem treatments.
32
cards
Assignment 2 - Gemstone Formation & Mining
• Understand the geological conditions necessary for gem formation.
• Describe the various gem formation processes.
• Define the different types of gem and mineral deposits.
• Understand the political and economic factors that affect gem mining costs.
• Communicate the methods used to find and evaluate gem deposits.
51
cards
Assignment 3 - Gems and their Physical Properties
• Describe the growth of a gem crystal.
• Explain how and when inclusions become part of a gem.
• Recognize the outward signs of a gem’s inner structure.
• Understand the relationship between a gem’s structure and its finished shape.
• Relate a gem’s physical properties to its usefulness in jewelry.
40
cards
Assignment 4 - Gems & Light
Wavelength the distance betweentw...,
Process by which a material absor...,
A pattern of dark vertical lines ...
46
cards
Assignment 5 - Synthetics & Imitations
A laboratory creation with essent...,
Any material that looks like a na...,
What are the two main categories ...
34
cards
Assignment 6 - Treatments
Why are some gems treated,
Why are some gems treated,
Why is treatment disclosure impor...
36
cards
Assignment 7 - The Colored Stone Market
Beneficiation a commitment torese...,
What is the basic structure of th...,
What is the basic structure of th...
31
cards
Assignment 8 - Color
What are the three components of ...,
How does the trade use special te...,
Color range the selection of colo...
25
cards
Assignment 9 - Cut
The angles and relative measureme...,
What properties of the rough dete...,
How do a cutter s decisions balan...
37
cards
Assignment 10 - Clarity
Characteristic or irregularity co...,
How do inclusions and blemishes a...,
How do inclusions and blemishes a...
30
cards
Assignment 11 - Carat
Per carat price the price of a ge...,
Metric carat the international un...,
Point one one hundredth of a cara...
20
cards
Assignment 12 - Ruby
What are the qualities of the fin...,
What makes a ruby red,
What factors influence a cutter s...
26
cards
Assignment 13 - Sapphire
What is blue sapphire s most impo...,
What causes sapphire s blue,
How are sapphires sometimes descr...
19
cards
Assignment 14 - Fancy Sapphire and Phenomenal Corundum
What is padparadscha,
How do the markets for pink and p...,
What market factors affect the de...
20
cards
Assignment 15 - Emerald
What is emerald s most important ...,
How are emerald colors commonly d...,
What conditions exist in places w...
22
cards
Assignment 16 - Pearl Formation, Types, and Market
An organic gem that forms inthe b...,
A pearl that forms without human ...,
Cultured pearl a pearl formed ast...
39
cards
Assignment 17 -Pearl Value Factors, Processing, and Treatments
A procedure that includes cleanin...,
Features used to judge the qualit...,
What qualities determine the over...
30
cards
Assignment 18 - Jade
Trade name for finest quality sem...,
What s the most desirable jadeite...,
How do texture and transparency a...
28
cards
Assignment 19 - Opal
Opal that lacks play of color,
What is opal s main component and...,
What properties determine opal s ...
42
cards
Assignment 20 - Quartz & Calcedony
A cryptocrystalline quartz aggregate,
Chalcedony with curved or angular...,
What makes amethyst the most priz...
26
cards
Assignment 21 - Tanzanite, Iolite, Chrysoberyl, and Andalusite
What are the choices a cutter has...,
Why is heat treatment important t...,
How did political changes affect ...
19
cards
Assignment 22 - Topaz & Beryl
Https wwwzhch de steuern finanzen...,
Where does most gem quality topaz...,
What treatments can modify the ap...
15
cards
Assignment 23 - Tourmaline, Peridot, and Zircon
Which tourmaline variety is the m...,
Which tourmaline variety makes a ...,
Which tourmaline colors are most ...
25
cards
Assignment 24 - Garnet and Spinel
How do garnets gemological classi...,
How are garnet species related,
Which green garnet species is the...
20
cards
Assignment 25 - Lapis Lazuli, Turquoise, and Other Opaque Gems
What mineral produces lapis lazul...,
How is lapis rough extracted from...,
What are the common lapis treatments
20
cards
Assignment 26 - Feldspar, Spodumene, and Diopside
What causes moonstone s adularesc...,
What are the characteristics of t...,
What is spectrolite
18
cards
Assignment 27 - Organics and Collectors’Stones
What are the ancient origins of m...,
What are the ancient origins of m...,
How are organic gems used in jewelry
22
cards
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GIA Graduate Gemologist - GEM 220 - Colored Stones
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