FEEG European Gemmologist Exam Study Guide

What is the FEEG European Gemmologist?

The Federation for European Education in Gemmology (FEEG) establishes a unified standard for gemmological education across Europe and associated member countries. The European Gemmologist title (FEG) is awarded to graduates of FEEG-recognized programmes who pass the federation's practical examination, demonstrating competence in instrument-based gemstone identification to a consistent pan-European standard.

The FEEG exam is not a replacement for national qualifications — it is an additional credential that signals proficiency recognized across borders. A German DGemG graduate, an Australian GAA diplomate, or a graduate from any other FEEG member institution can sit the FEEG exam to earn the European Gemmologist designation.

Who takes this exam

FEEG membership includes gemmological associations and educational institutions across Europe and beyond. Candidates typically come from one of the following member organizations:

• DGemG (Deutsche Gemmologische Gesellschaft) — Germany. One of the most rigorous national programmes, based in Idar-Oberstein, the historic centre of European gem cutting.
• GAA (Gemmological Association of Australia) — Australia. Offers distance-learning and campus-based diploma programmes recognized by FEEG.
• Belgian, Dutch, Italian, Spanish, and Scandinavian institutions — various national gemmological societies that are FEEG members.
• Independent candidates — in some cases, graduates of non-member programmes may petition to sit the exam if they can demonstrate equivalent training.

Because candidates arrive from different national curricula, the FEEG exam tests fundamental instrument competence rather than curriculum-specific knowledge. The stones selected and the skills tested should be achievable by any graduate-level gemmologist, regardless of their training institution.

Exam format

The FEEG practical exam presents 12 unknown gemstones that must be identified using standard gemmological instruments. Each stone requires a systematic workflow: visual examination, refractometer reading, polariscope observation, specific gravity measurement, and additional tests as needed (dichroscope, spectroscope, UV fluorescence, Chelsea filter, magnification).

The time allocation works out to approximately 22 minutes per stone — more generous than the GIA format but less than some national exams. This reflects the FEEG philosophy that competent identification should be methodical but not laborious. Students who have internalized a consistent workflow will find the timing comfortable.

Stone selection

The 12 stones are selected to test a range of identification challenges:

• Common commercial species (corundum, beryl, tourmaline, quartz, garnet, topaz)
• Stones that require careful separation by properties (e.g., blue topaz vs. aquamarine, almandine vs. rhodolite)
• At least one synthetic or treated stone
• Cabochon and faceted cuts
• Both transparent and translucent/opaque materials

The stone set is designed to be fair across different national curricula. Exotic species that only appear in one country's syllabus are generally not included. The focus is on core competence with the instruments and with commonly encountered gem materials.

Scoring and pass criteria

The FEEG exam uses a methodology-based marking system similar to the Gem-A format, where credit is awarded for correct observations and instrument readings as well as the final identification.

Marks are awarded for:

• Correct instrument readings: RI value, SG value, optic character, birefringence calculation
• Systematic observations: pleochroism, fluorescence (LW/SW), spectroscope, Chelsea filter response, inclusion description
• Logical reasoning: your written explanation of how you arrived at your identification, demonstrating the elimination process
• Final identification: correct species and variety name

The pass threshold requires demonstrating competence across the full stone set. Individual stone failures do not automatically fail the exam, provided your overall methodology marks are strong and the number of completely incorrect identifications is limited.

Instruments and equipment

The FEEG exam provides the standard gemmological instrument set at each station:

• Gemological refractometer with RI contact liquid and polarizing filter
• Polariscope with condensing lens for optic figure observation
• Calcite dichroscope
• Handheld spectroscope (diffraction grating or prism)
• UV lamp — longwave (365 nm) and shortwave (254 nm)
• Chelsea colour filter
• 10x triplet loupe
• Gemological microscope with darkfield and overhead illumination
• Hydrostatic weighing apparatus (balance, beaker, wire basket)
• Tweezers, stone cloth, penlight

The instrument set is deliberately standard — no advanced equipment like EDXRF, Raman spectroscopy, or photoluminescence is used. The exam tests what a trained gemmologist can determine with traditional bench instruments, which is the level of competence the European Gemmologist title certifies.

Study strategy

Start with your national curriculum

Your primary preparation should follow the curriculum of your training institution. The DGemG, GAA, or other national programme has prepared you for the core content. The FEEG exam does not test outside that core — it tests whether you can apply it consistently under timed conditions. Review your course notes, but spend the majority of your preparation time on practical instrument work, not reading.

Build a consistent 12-step workflow

Every stone on the exam should receive the same systematic treatment. Develop a workflow and follow it for every stone without exception:

1. Visual examination: colour, transparency, luster, phenomenon
2. Loupe examination (10x): inclusions, surface features, facet doubling
3. Refractometer: RI reading (rotate polarizer for high/low on DR stones)
4. Calculate birefringence (if DR)
5. Polariscope: SR / DR / AGG / ADR
6. Optic figure (if DR): uniaxial or biaxial, optic sign if determinable
7. Dichroscope: pleochroism type (none / weak / moderate / strong)
8. Chelsea filter: red / green / inert
9. Spectroscope: absorption lines or bands
10. UV fluorescence: LW and SW response
11. Specific gravity: hydrostatic weighing
12. Microscope: inclusions, growth features, treatment indicators

Not every step will be needed for every stone — an RI of 1.544 with uniaxial optic character immediately points to quartz, and you may only need SG to confirm. But having the workflow means you never forget a test that could earn marks or prevent a misidentification.

Focus on the separation problems

The FEEG exam reliably includes stones that require careful property-based separation. Practice these common pairs and groups until you can separate them confidently:

• Aquamarine vs. blue topaz: Overlapping RI ranges, but topaz is biaxial with higher SG (~3.53 vs. ~2.72). Pleochroism is weak in both. SG is the clean separator.
• Garnet group: All SR, many with overlapping RI ranges. Almandine vs. rhodolite vs. pyrope requires RI + SG + spectroscope. The almandite iron absorption trio is diagnostic.
• Natural vs. synthetic corundum: Identical physical properties. Separation requires magnification — look for curved striae and gas bubbles (flame-fusion), chevron growth (hydrothermal), or flux inclusions (flux process).
• Tourmaline vs. peridot: Both DR with green varieties, but peridot has much higher birefringence (~0.036 vs. ~0.018) and shows strong facet doubling. RI ranges are similar but SG differs.
• Jadeite vs. nephrite: Both translucent green, but different RI (jadeite ~1.66, nephrite ~1.62), different SG (jadeite ~3.34, nephrite ~2.95), and different spectroscope responses.

Practice under timed conditions

Set up 12-stone practice sessions with a 4.5-hour timer. Use stones from your teaching collection if available. If you do not have access to physical stones, GemID's FEEG exam simulator provides timed sessions with 12 randomized stones and methodology-based scoring.

Cross-curriculum preparation

If you trained in one national system, you may encounter testing conventions that differ slightly from your training. For example, German programmes may emphasize optic figure determination more heavily, while Australian programmes may place more weight on spectroscope interpretation. Review the GemID methodology page for a curriculum-neutral explanation of how each instrument contributes to identification. The Reference Database provides standardized property data for all species you might encounter.