Learn about gemstones.

01 · SRI LANKA

Sri Lankan Gemstones

Learn about Sri Lankan gemstones including sapphire, ruby, spinel, chrysoberyl, garnet, zircon, tourmaline and moonstone.

Read the guide →02 · SAPPHIRE

Ceylon Blue Sapphire

Understand Ceylon blue sapphire colour, clarity, cut, carat weight, treatment, origin and certification before buying.

Read the guide →03 · IDENTIFICATION

Natural vs Synthetic Gems

Learn the difference between natural, laboratory-grown and imitation gemstones and why professional testing matters.

Read the guide →04 · TREATMENT

Heated vs Unheated Sapphire

A clear guide to sapphire heat treatment, disclosure, laboratory testing and how treatment may affect rarity and value.

Read the guide →05 · BUYING

Gemstone Value Factors

Understand the main factors that influence coloured gemstone value: identity, colour, clarity, cut, carat, treatment, origin and certification.

Read the guide →06 · EDUCATION

Gemstone Identification

Learn the safe sequence for gemstone identification using observation, loupe, light, refractive index, specific gravity and laboratory confirmation.

Read the guide →07 · SRI LANKA

Geuda Sapphire

An introduction to Sri Lankan geuda sapphire, common appearances, careful selection and the role of heat treatment.

Read the guide →08 · MINING

Gem Mining in Sri Lanka

Learn how Sri Lankan alluvial gem deposits form, what illam is and how gemstones move from responsible mining to sorting and market.

Read the guide →09 · BUYING

Gemstone Certification

Understand what a gemstone laboratory report can state about identity, natural or synthetic origin, treatments, weight, measurements and origin opinion.

Read the guide →10 · BUSINESS

Start a Gem Business

A beginner-friendly roadmap for learning gemstone identification, buying safely, pricing, record keeping, legal requirements and building trust.

Read the guide →11 · IDENTIFICATION

Gemstone Inclusions

Learn about crystal, needle, silk, cloud, feather, fingerprint, fluid and colour-zoning inclusions in natural gemstones.

Read the guide →12 · TESTING

Gemstone Testing Tools

A practical guide to gemstone testing tools including loupe, tweezers, torch, refractometer, polariscope, dichroscope, spectroscope, UV and microscope.

Read the guide →13 · GEMOLOGY

Gemstone Physical Properties

Understand refractive index, specific gravity, Mohs hardness, cleavage, fracture, lustre, transparency and durability in gemstones.

Read the guide →14 · GEM FAMILIES

Corundum: Ruby & Sapphire

Learn how ruby and sapphire belong to the corundum family, including colour causes, hardness, refractive index, crystal system and treatments.

Read the guide →15 · SAPPHIRE

Padparadscha Sapphire

Understand padparadscha sapphire pink-orange colour, rarity, treatment, origin, laboratory reports and buying considerations.

Read the guide →16 · OPTICAL EFFECTS

Star Sapphire

Learn how star sapphire forms, why rutile silk creates asterism, how cabochon cutting reveals the star and what affects quality.

Read the guide →17 · SAPPHIRE

Yellow Sapphire

A practical guide to yellow sapphire colour, clarity, cut, carat weight, treatment, certification and buying decisions.

Read the guide →18 · GEM FAMILIES

Gemstone Families

Explore major gemstone families including corundum, beryl, garnet, quartz, feldspar, tourmaline, spinel, chrysoberyl, zircon and topaz.

Read the guide →

Educational information only. Important gemstone purchases should be supported by professional examination and an appropriate independent laboratory report.