Gemology Course

Lesson 1 • Basic Mineralogy for Gemologists

Covers crystal systems, chemical composition, and mineral formation relevant to gems. Grounds optical and physical property study in scientific principles.

Lesson 2 • History and Scope of Gemology

Traces gemology from ancient trade to modern science, establishing professional context. Sets the stage for understanding why systematic gem study matters.

Lesson 3 • Gem Classification Systems

Introduces the mineral, organic, and synthetic gem categories used industry-wide. Provides the taxonomic framework applied throughout the course.

Lesson 1 • Cleavage, Fracture, and Tenacity

Distinguishes cleavage directions, fracture types, and tenacity grades in gemstones. These properties guide cutting decisions and durability assessments.

Lesson 2 • Hardness Testing Methods

Explains the Mohs scale and scratch testing protocols for gem identification. Connects hardness data to mineral species determination.

Lesson 3 • Specific Gravity Measurement

Teaches hydrostatic weighing and heavy liquid methods to determine gem density. Density data narrows identification when optical tests are inconclusive.

Lesson 4 • Luster and Surface Characteristics

Identifies luster types from adamantine to waxy and their diagnostic value. Surface features aid species identification and quality grading.

Lesson 1 • Light and Gem Interaction Fundamentals

Explains reflection, refraction, absorption, and transmission as light enters a gem. Forms the theoretical basis for all optical identification techniques.

Lesson 2 • Colour Theory and Gem Coloration

Analyses idiochromatic and allochromatic coloration mechanisms in gemstones. Connects chromophore chemistry to observed hue, tone, and saturation.

Lesson 3 • Pleochroism and Optical Phenomena

Identifies pleochroism, asterism, chatoyancy, adularescence, and other phenomena. Optical phenomena serve as key identification and value factors.

Lesson 4 • Fluorescence and Spectroscopy Basics

Introduces UV fluorescence and visible absorption spectroscopy as identification aids. Students interpret spectral patterns to confirm gem species and detect treatments.

Lesson 1 • The Spectroscope

Instructs students in prism and diffraction grating spectroscope operation. Absorption line patterns confirm species and reveal chromophore identity.

Lesson 2 • Microscopy in Gemology

Applies binocular microscope techniques to examine inclusions, growth features, and treatments. Microscopy provides definitive evidence unavailable from other instruments.

Lesson 3 • The Refractometer

Teaches refractometer operation, RI reading, and birefringence calculation. Accurate RI measurement is the cornerstone of gem identification.

Lesson 4 • Advanced and Laboratory Instruments

Surveys EDXRF, Raman spectroscopy, UV-Vis, and FTIR as laboratory-grade tools. Students understand when to refer specimens to advanced testing facilities.

Lesson 1 • Diamond Treatments and Simulants

Identifies HPHT colour treatment, fracture filling, laser drilling, and common simulants. Detection skills protect buyers and maintain market integrity.

Lesson 2 • Ruby: Identification and Quality

Examines corundum chemistry, ruby colour origins, and quality evaluation factors. Students distinguish ruby from red spinel, garnet, and glass.

Lesson 3 • Diamond: Properties and Grading

Covers diamond crystal structure, optical properties, and the 4Cs grading system. Students grade cut, colour, clarity, and carat weight on actual stones.

Lesson 4 • Emerald: Properties and Treatments

Analyses beryl chemistry, emerald colour, jardin inclusions, and fracture filling. Students assess clarity, colour, and treatment extent in emerald specimens.

Lesson 1 • Quartz, Feldspar, and Garnet Groups

Examines crystalline and cryptocrystalline quartz, feldspar phenomena, and garnet series. Group chemistry explains the wide colour range within each family.

Lesson 2 • Chrysoberyl, Zircon, and Topaz

Identifies alexandrite, cat's-eye chrysoberyl, zircon types, and topaz varieties. High birefringence and dispersion values distinguish these species from simulants.

Lesson 3 • Beryl, Tourmaline, and Spinel

Covers aquamarine, morganite, tourmaline varieties, and spinel identification. Students use RI, SG, and spectroscopy to separate these frequently confused species.

Lesson 4 • Opal, Turquoise, and Jade

Covers opal play-of-colour, turquoise matrix, and jadeite vs. nephrite distinction. Students identify treatments and imitations common in these species.

Lesson 1 • Heat Treatment Detection

Identifies heat treatment evidence in corundum, beryl, and other species. Microscopic and spectroscopic clues reveal whether a gem has been thermally enhanced.

Lesson 2 • Synthetic Gem Production Methods

Explains flame fusion, hydrothermal, flux, and CVD growth methods for lab-grown gems. Each method leaves characteristic inclusions and growth features.

Lesson 3 • Fracture Filling and Coating

Detects glass, resin, and oil fillings in emerald, ruby, and diamond. Surface coatings alter colour and luster and require specific detection techniques.

Lesson 4 • Identifying Synthetics vs. Naturals

Applies microscopy, spectroscopy, and advanced testing to separate synthetic from natural gems. Students practise systematic identification on mixed specimen sets.

Lesson 1 • Gem Valuation Principles

Explains supply, demand, rarity, origin premiums, and market trends as value drivers. Students apply valuation logic to produce defensible price estimates.

Lesson 2 • Colour Grading Systems and Standards

Compares major colour grading systems and their application to coloured gemstones. Consistent colour communication is essential for accurate valuation and trade.

Lesson 3 • Gem Trade, Ethics, and Documentation

Covers gem trade channels, ethical sourcing standards, and professional report writing. Students draft grading reports meeting industry documentation standards.

Lesson 4 • Carat Weight and Measurement

Covers carat weight measurement, dimensional formulas, and weight estimation for set stones. Accurate weight data is fundamental to pricing and documentation.