- What "CGA Training" Actually Means
- Before Training Begins: The Gate You Must Clear
- The Approved Education Route: GJ201 and GJ202
- Training for Two Different Examinations
- GJ201 Topics Worth Drilling
- GJ202 Topics Worth Drilling
- Sequencing Your Preparation
- What You Cannot Train For (Yet)
- Training Never Fully Ends: Recertification
- Frequently Asked Questions
- CGA means Certified Gemologist Appraiser, an American Gem Society credential, and it is open only to existing AGS Certified Gemologists.
- Approved foundational appraisal education is a prerequisite; ASA GJ201 plus GJ202 is one route AGS currently accepts.
- The initial exam fee is $349 after prerequisite approval, and access is nonrefundable and nontransferable.
- Candidates face a theory examination plus a separate practical appraisal-report-writing examination.
What "CGA Training" Actually Means
Search for "CGA training" and you will find results about several unrelated credentials that happen to share the same three letters. On this page, CGA means one thing only: the Certified Gemologist Appraiser credential from the American Gem Society (AGS). If you want a fuller orientation first, see our explainers on what CGA is and what CGA stands for.
Training for this credential is unusual because it happens in layers. First, you need gemological standing. Then you need approved appraisal education. Only after those are in place do you reach the AGS examinations themselves. Most candidates who stumble do so because they treat it as a single "cram for a test" project rather than a sequence with distinct gates.
Before Training Begins: The Gate You Must Clear
Before you spend a dollar on coursework, confirm you qualify to sit for the credential at all. According to AGS, applicants must:
- Already hold the AGS Certified Gemologist credential.
- Complete approved appraisal education.
- Complete color-vision testing.
- Agree to the applicable approved appraisal and report standards.
- Be employed at an AGS member business; there is no general non-member exam price.
Our CGA requirements guide walks through eligibility in more detail. The practical point for training: if you are not yet an AGS Certified Gemologist, your first "training" is that credential, not appraisal coursework.
The Approved Education Route: GJ201 and GJ202
An August 6, 2026 AGS announcement replaced the former Appraisals I and II prerequisite with approved external foundational appraisal education. AGS's current qualifying-education page explicitly accepts ASA GJ201 plus GJ202, among other routes. We use that pairing as our training spine because it is a concrete, documented path, but it is one option, not a mandate. You are not required to choose ASA, and completing these courses does not make CGA equivalent to an ASA credential. Always verify your chosen route against the AGS page before enrolling.
| Course | Focus | What You Practice |
|---|---|---|
| GJ201: Foundation I: Core Principles of Appraising Gems and Jewelry | Valuation theory, ethics, USPAP-based vocabulary, economic context | Understanding concepts that carry into every later course |
| GJ202: Foundations II: Appraising Gems and Jewelry for Insurance Scheduling | Developing and reporting an insurance-scheduling appraisal | Building a new report, or modifying an existing one, for a single item of jewelry |
Note that GJ203 sits outside this minimum route. Do not assume you need it to qualify.
Training for Two Different Examinations
The CGA initial assessment has two parts that exercise different muscles:
- A theory examination, which tests whether you understand appraisal principles.
- A practical appraisal-report-writing examination, which tests whether you can produce a competent report.
The examinations are AGS-controlled and delivered online. The testing or proctoring vendor is not publicly identified. Beyond that structure, several details are simply not published: question and task counts, the scored/unscored split, the theory response format, timed-component limits, and the initial passing threshold. Calculator, open-book, adaptive, and proctoring rules for the initial exam are also unverified. We would rather tell you that plainly than invent specifics. For what is and is not known on scoring, see our CGA passing score page.
GJ201 Topics Worth Drilling
Domain 1: GJ201 - Foundation I: Core Principles of Appraising Gems and Jewelry
This course builds on the concepts, vocabulary, and expectations of the Uniform Standards of Professional Appraisal Practice (USPAP). It is the conceptual base for everything that follows. Expect to master:
- Ethics, competency, privacy, and the responsibilities of the appraiser.
- The three approaches to valuation and when each applies.
- Types of markets and their various levels.
- Definitions of value and why the chosen definition changes the answer.
- The client / intended user / appraiser relationship.
- Basic economic theory, including how macroeconomic and local forces affect jewelry valuation.
- Descriptive elements for the various types of gems and jewelry you are likely to encounter.
The trap here is memorizing definitions without being able to apply them. If you can explain why a retail-replacement figure and a fair-market-value figure for the same ring can differ, and which one an insurance client needs, you are studying correctly. Our domains guide maps these preparation categories in more depth, keeping in mind that they are unweighted preparation categories, not an official blueprint.
GJ202 Topics Worth Drilling
Domain 2: GJ202 - Foundations II: Appraising Gems and Jewelry for Insurance Scheduling
This is the practical application of GJ201, with USPAP Standard 7 and Standard 8 forming the basis for developing and reporting a gems and jewelry appraisal. Prepare to demonstrate:
- When and how to apply the primary approaches to valuation.
- Recognizing and ranking the relevant characteristics of specific property types.
- Core concepts of data research and reconciliation.
- Narrative report writing.
- The required elements of a USPAP-compliant report (and, in the ASA course, an ASA-compliant one).
Because GJ202 credit requires building or revising a full report on a single item, it doubles as rehearsal for the practical report-writing portion of the CGA. Keep your finished GJ202 report as a model. Reviewing how you moved from description to data research to reconciliation to a defensible conclusion is some of the most CGA-relevant practice available.
Key Takeaway
Do not treat report writing as a formatting exercise. The skill being assessed is defensible reasoning: your value conclusion must trace back to your research, your chosen approach, and the intended use. Practice explaining each step in plain narrative.
Sequencing Your Preparation
Generic study advice matters less here than ordering the material correctly. Because GJ202 depends on GJ201, learn them in that order and revisit GJ201 vocabulary while writing your first report. Here is one way to pace the work once your prerequisites are approved and before you launch the exam window:
Rebuild the GJ201 foundation
- Review ethics, competency, and privacy obligations.
- Rehearse the three approaches and the definitions of value.
- Practice distinguishing market levels.
Apply it through GJ202-style reports
- Draft a narrative report for a single piece.
- Document your data research and reconciliation.
- Check each element against USPAP Standard 7 and 8 expectations.
Timed readiness before launch
- Run mixed theory questions at our practice test site.
- Rewrite a weak report section from scratch.
- Confirm the access window with AGS, then launch.
For a broader plan, see the CGA study guide, and keep the CGA cheat sheet handy for a last-pass review.
What You Cannot Train For (Yet)
Honest preparation means acknowledging gaps. As of our review of public sources on September 30, 2026, the following remain unverified: the number of questions or tasks, timed limits for any component, theory response format, the initial passing threshold, numerical domain weights, and the public pass rate. No dated 2026 weighted blueprint for the initial exam exists publicly, so we cannot tell you which area carries the most weight.
That has a practical consequence. Rather than gambling on a rumored emphasis, train evenly across both domains and prioritize the skill that is hardest for you. Candidates who write well but struggle with valuation theory should shift time toward GJ201 concepts; candidates strong on theory but slow at drafting should spend more hours producing complete reports. Our articles on exam difficulty and the pass rate explain why firm numbers are not available.
Training Never Fully Ends: Recertification
Earning the credential starts a maintenance cycle. AGS requires annual recertification, with applicable fees and appraisal-report review when requested. The renewal exam is a different animal from the initial one: it is open book, untimed, with a 75% pass mark, delivered through AGS PRO. The 2026 deadline of September 22 at 11:59 p.m. PT has passed, and credentials earned on or after December 1, 2025 first renew in 2027. Fixed continuing-education hours and the annual fee amount are not verified, so check AGS directly.
Do not reverse-engineer the initial exam from the renewal format. Open-book, untimed, 75% rules apply to annual renewal only and tell you nothing reliable about the initial theory or practical examinations.
If you are weighing whether the investment pays off, our ROI analysis, salary guide, and CGA jobs overview cover the career side. Because the credential requires employment at an AGS member business, most opportunities sit within that jeweler network.
Frequently Asked Questions
No. AGS accepts ASA GJ201 plus GJ202 as one approved foundational education route, among others. Check the current AGS qualifying-education page to confirm which options fit your situation before enrolling anywhere.
The initial exam fee is $349 after your prerequisites are approved. AGS notes Diamond and Gold member discounts, but the amounts are not quoted publicly. Access is nonrefundable and nontransferable.
AGS pages conflict: one says three weeks from launch, another says two weeks. Both describe an access window rather than a timed-test duration. Confirm the applicable window with AGS and plan around the shorter one.
There is a theory examination and a separate practical appraisal-report-writing examination, both administered online under AGS control. Question counts, response formats, timing, and the passing score for the initial exam are not publicly verified.
No. Those rules apply only to annual recertification through AGS PRO. They should not be used to infer the initial exam's format, timing, or passing threshold. For more on cost and timing, see our exam dates guide.