100+ Free MGA Practice Questions

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On the Mohs hardness scale, diamond is ranked:

to track

2026 Statistics

Key Facts: MGA Exam

100

Practice Questions

OpenExamPrep

70%

Passing Score

GJ210 + practical

5 years

Relevant Experience

Plus ASA designation + GG

$1,995

Exam + Course Fee

ASA

5 years

Reaccreditation Cycle

CE + USPAP required

GG + ASA

Prerequisites

GIA GG or Gem-A FGA + ASA

The MGA is a capstone credential requiring: (1) current ASA designation in Gems & Jewelry, (2) GIA GG or equivalent, (3) 5+ years of relevant appraisal experience, (4) GJ209 completion, (5) GJ210 written and hands-on practical exam (~70% passing), and (6) maintenance of a documented appraisal laboratory with refractometer, polariscope, dichroscope, spectroscope, microscope, UV lamps, and specific-gravity apparatus. Typical combined course and exam cost is roughly $1,995 plus ASA membership. Reaccreditation is on a 5-year CE cycle.

Sample MGA Practice Questions

Try these sample questions to test your MGA exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1On the Mohs hardness scale, diamond is ranked:

A.9

B.10

C.8

D.7

Explanation: Diamond is the hardest natural mineral and is ranked 10 on the Mohs scale. Corundum (ruby, sapphire) is 9, topaz 8, and quartz (including amethyst and citrine) 7. The Mohs scale is a comparative (not linear) scale of scratch resistance.

2The diamond color grading scale established by the GIA ranges from:

A.A to Z

B.D to Z

C.1 to 10

D.I1 to I3

Explanation: The GIA color scale for colorless to light-yellow/brown diamonds runs from D (colorless) through Z (light color). D-F are ‘colorless,’ G-J ‘near colorless,’ K-M ‘faint,’ N-R ‘very light,’ and S-Z ‘light.’ Diamonds with color beyond Z enter the fancy color grading system.

3Which of the following is NOT one of the standard GIA diamond clarity grades?

A.FL

B.VVS1

C.SI3

D.I1

Explanation: The GIA clarity scale is FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2, I3. ‘SI3’ is used in some non-GIA systems (such as EGL) but is not a GIA clarity grade. Graders must use standardized nomenclature and disclose the laboratory whose system is being used.

4Strong blue fluorescence in a D-F color diamond typically:

A.Always increases value

B.May result in a slight discount in the market

C.Has no effect on value

D.Makes the diamond ineligible for grading

Explanation: In higher color grades (D-F), strong-to-very-strong blue fluorescence can produce a slightly ‘hazy’ or milky appearance in some stones and often trades at a small discount. In lower color grades (H and below), fluorescence can actually mask yellow and may be neutral or slightly positive.

5CVD (Chemical Vapor Deposition) is a method of:

A.Natural diamond formation

B.Laboratory growth of synthetic diamonds

C.Heat treatment of sapphires

D.Irradiation of topaz

Explanation: CVD is one of two principal methods for growing laboratory-grown (synthetic) diamonds; the other is HPHT (high-pressure, high-temperature). Lab-grown diamonds are physically and chemically similar to natural diamonds but must be disclosed under FTC Jewelry Guides.

6The GIA DiamondView instrument is primarily used to:

A.Grade color

B.Detect fluorescence patterns useful for identifying lab-grown vs natural diamonds

C.Weigh the stone

D.Measure refractive index

Explanation: The DiamondView exposes the stone to short-wave UV and reveals fluorescence patterns that help separate HPHT- and CVD-grown synthetics from natural diamonds. Complementary instruments include DiamondSure, DiamondPlus, and GIA AMS.

7The most valuable ruby origin is historically considered to be:

A.Mozambique

B.Thailand

C.Mogok, Myanmar (Burma)

D.Tanzania

Explanation: Classic Burmese (Mogok) rubies are historically the most valuable due to their rich ‘pigeon blood’ red color, strong fluorescence, and rarity. Other significant sources include Mozambique (major contemporary producer), Thailand, Madagascar, Afghanistan, and Vietnam.

8Kashmir origin is most famously associated with which gemstone?

A.Emerald

B.Sapphire

C.Tanzanite

D.Ruby

Explanation: Kashmir sapphires, mined in the late 19th century, are legendary for their velvety cornflower-blue color and command premiums in the collector market. Other notable sapphire origins include Ceylon (Sri Lanka), Burma (Myanmar), Madagascar, and Montana.

9Colombia is historically the most important source of:

A.Ruby

B.Sapphire

C.Emerald

D.Tanzanite

Explanation: Colombian emeralds (Muzo, Chivor, Coscuez) have been the historical benchmark for emerald color and quality. Other major sources include Zambia (Kagem), Brazil, Ethiopia, Afghanistan (Panjshir), and Russia.

10Tanzanite is found primarily in:

A.Multiple locations worldwide

B.A single mining area near Mount Kilimanjaro, Tanzania

C.Myanmar and Sri Lanka

D.Colombia only

Explanation: Tanzanite (blue-violet zoisite) is mined only near Merelani, at the base of Mount Kilimanjaro in Tanzania. Its single-source rarity is part of its valuation narrative. Nearly all gem-quality tanzanite is heat-treated to enhance its blue-violet color.

About the MGA Exam

The MGA is the highest-level specialty designation in the ASA Gems & Jewelry discipline. Only currently designated ASA (Accredited Senior Appraiser) members who hold a GIA Graduate Gemologist (GG) diploma (or accepted equivalent such as Gem-A FGA) may apply. Candidates must complete GJ209 (advanced gemological topics) and GJ210 (the Master Gemologist Appraiser Examination, which includes a hands-on practical) within the 5-year reaccreditation cycle, maintain an appraisal laboratory with documented instruments, and demonstrate proficiency across diamond grading, colored-stone identification, pearl testing, estate jewelry, and report writing.

Questions

100 scored questions

Time Limit

GJ210 = theory + hands-on practical

Passing Score

70%

Exam Fee

~$1,995 (American Society of Appraisers (ASA))

MGA Exam Content Outline

25%

Diamond Grading

4Cs (color D-Z, clarity FL-I3, cut grades, carat weight), fluorescence, fancy colors, polish/symmetry, proportions (table %, depth %, crown/pavilion angles), laser inscription, melee, lab-grown (CVD/HPHT) detection (DiamondView, DiamondSure, AMS)

25%

Colored Gemstones

Species/variety identification, origin determination (Kashmir sapphires, Burma/Mogok rubies, Colombian emeralds, Paraiba tourmaline, tanzanite, alexandrite, opal, jade), treatments (heat, fracture filling, beryllium diffusion, irradiation, dyeing), optical phenomena (asterism, chatoyancy, play-of-color, color change)

15%

Pearls

Natural vs. cultured (bead-nucleated vs. tissue-nucleated), akoya/South Sea/Tahitian/freshwater, grading (size, shape, color, luster, surface, nacre, matching), X-ray identification, treatment disclosure

15%

Estate Jewelry, Hallmarks & Metal Assay

Periods (Georgian, Victorian, Edwardian, Art Nouveau, Art Deco, Retro, Mid-Century, Contemporary), signed designer pieces, hallmarks, gold karat and platinum/palladium marking, XRF analysis, sterling and coin silver

10%

Gemological Instruments

10x loupe, microscope 10-40x, refractometer, polariscope, dichroscope, spectroscope, UV lamps (LW/SW), specific-gravity apparatus, UV-Vis-NIR, FTIR, Raman, LA-ICP-MS (for origin determination)

10%

USPAP 7-8, FTC & Regulatory

USPAP Standards 7 and 8 (personal property development and reporting), FTC Jewelry Guides, CIBJO Blue Book, Kimberley Process, Dodd-Frank 1502 conflict minerals, Responsible Jewellery Council, IRC §170 (IRS Form 8283)

How to Pass the MGA Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: GJ210 = theory + hands-on practical
Exam fee: ~$1,995

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

MGA Study Tips from Top Performers

1Memorize diamond color (D-Z) and clarity (FL-I3) scales and be able to describe characteristic inclusions for each grade

2Know origin indicators: Kashmir sapphires (silk, milky sheen), Burmese rubies (red fluorescence, specific inclusions), Colombian emeralds (three-phase inclusions)

3Understand treatment detection: heat (rutile silk breakdown), fracture filling (flash effect), beryllium diffusion (colored rim), irradiation (spectroscopic signatures)

4Know the pearl taxonomy — bead-nucleated (saltwater) vs. tissue-nucleated (Chinese freshwater)

5Practice karat math: 14K = 58.3%, 18K = 75%, 22K = 91.7%, platinum ≥ 95% when stamped PLAT

6Memorize estate jewelry periods: Georgian 1714–1837, Victorian 1837–1901, Edwardian 1901–1914, Art Deco 1920–1935, Retro 1935–1950

7Know the disclosure triad: FTC Jewelry Guides (US), CIBJO Blue Book (international), and USPAP Standards 7-8

8Understand the roles of DiamondView, DiamondSure, GIA iD100, and AMS in lab-grown diamond detection

Frequently Asked Questions

What is the MGA credential?

The Master Gemologist Appraiser is the capstone specialty designation in ASA’s Gems & Jewelry discipline. It requires a current ASA (Senior) designation, a GIA GG or equivalent, completion of GJ209 and GJ210, and maintenance of a documented appraisal laboratory.

What is the GJ210 exam like?

GJ210 is the Master Gemologist Appraiser Examination. It is a proctored exam that includes theoretical components and a hands-on practical: candidates identify loose and mounted gemstones (including diamonds and simulants) and grade diamonds for color and clarity. Successful completion demonstrates both theoretical mastery and practical laboratory proficiency.

Who can apply for the MGA?

Only currently designated ASA members (Accredited Senior Appraiser status in Gems & Jewelry) may hold the MGA. Candidates must also hold the GIA GG diploma, Gem-A FGA, or an approved equivalent. Plus ~5 years of relevant experience and a fully equipped laboratory.

How much does MGA certification cost?

The GJ209 plus GJ210 course-and-exam fee is approximately $1,995. Additional costs include the GIA GG diploma program (several thousand dollars), ASA membership dues, CE, instrument acquisition and calibration, and discipline-specific CE for the 5-year reaccreditation cycle.

Is MGA recognized outside the United States?

Yes. MGA is internationally recognized within the jewelry appraisal industry. MGA holders frequently serve insurance, estate, litigation, and customs clients both domestically and internationally. CIBJO harmonization and FTC Jewelry Guides inform much of the global disclosure framework.

How should I prepare for GJ210?

MGA candidates typically already have the GIA GG and years of practical experience, so preparation focuses on refreshing advanced identification skills (origin determination, treatment detection), mastering USPAP Standards 7-8, and practicing with loose and mounted stones using a calibrated lab. Complete this free 100-question practice set to surface gaps in diamond grading, colored-stone identification, pearl testing, and estate jewelry knowledge.