Learning Center

Uncategorized

The Sacred Emerald Buddha

Carved in Thailand in 2006 from a 3,600-ct emerald, “The Sacred Emerald Buddha” has a message of peace. Read the inside story of this amazing…

An Introduction to Gemology

Learn what gemologists do in our introduction to gemology. Whether your interest is casual or professional, the world of gems will amaze you.

Properties of Diamond Simulants

Diamond simulants, like cubic zirconia and moissanite, often appear in jewelry. See how the properties of real diamonds compare with popular…

A World of Crystals

We live in a world of crystals. You don’t have to dig deep into the Earth to find them. Even the bones in our bodies and the dust in the air contain them.…

An Introduction to Fancy Gem Cuts

Although rounds and other standard shapes dominate the gemstone market, fancy gem cuts offer many beautiful alternatives that can also improve…

A Guide to Gem Cutting Styles

Gem cutting styles refer to the shape and arrangement of facets. The three most basic styles are brilliant, step, and mixed. Learn what characterizes…

Gemstones and Refraction Liquids

Gemologists use refraction liquids to identify gemstone refractive indices (RI). Learn about the properties of these liquids and safe RI testing…

Bead and Necklace Size Charts

Whether you’re a novice bead jewelry maker or just shopping for necklaces, these bead and necklace size charts and links to related articles…

Standard Gem Sizes Chart

Will your gem fit in a standard setting? Use this chart of standard gem sizes for popular cuts and also learn how to estimate gem weight based on size.…

Quartz Color Treatments

Quartz color treatment results vary due to the stone’s origin. Learn the effects you can achieve with different materials and radiation and heat…

What is a Gem?

Even the most general definition of a gem has many exceptions. Learn what qualities have been used to identify gemstones both scientifically and…

A Guide to Gem Classification

There is not one way to classify gems, rather there are several ways, each of which has its own purpose and its own exceptions that warrant close attention.…

What are Gemstone Enhancements?

Gemstone enhancements improve the appearance and wearability of gems. Learn about the most commonly used procedures and frequently treated…

Jewelry Nomenclature: Gem Earrings

Earrings are available in many styles. Learn to identify the most popular types of metal and gem earrings and the parts that comprise these jewelry…

Jewelry Nomenclature: Gem Rings

Though rings may come in many styles, gem cutters will regularly encounter a few common types of gem rings. Learn how to identify these popular designs.…

Jewelry Nomenclature: Gem Settings

Jewelry designers and consumers can pick from many different gem settings. Learn the names and uses of common and speciality settings for any type…

Build Your Own Gemology Tools

Are you a hobbyist or professional gemologist facing high equipment costs? Read our IGS series of articles that can help you build your own gemology…

Make a Bracelet

A step by step procedure on how to make a bracelet. Detailed information on tools and materials needed. Read and Understand instructions to complete…

Spectroscope Instructions

The spectroscope is one of gemology’s principal tools. Our basic spectroscope instructions will teach you how to operate and calibrate this…

Birthstone Chart

Birthstones listed by month. Also listed are both the Modern Birthstones and the Ancient Birthstones.

LAP MATERIALS

A tabel of Lap Materials, Compliments of The International Gem Society. These figures are approximate and are put together for your general reference.…

Ring Size Comparison Chart

Ring Size Comparison Chart compliments of the International Gem Society. A conversion table of Ring sizes. 7 different ring size equivalents…

Gem Structure Chart

A gem structure chart that shows various information on a specific structure and gems of example. Details include Refractive Indexes, Pleochroism…

METAL/WAX FORMULAS

Jewelers need to know how to determine how much gold is needed for a wax mold. Here are three methods for you.Information and tips on metal or wax formulas.…