Exploring The Earth

A comprehensive guide on how to distinguish laboratory-grown synthetic gemstones from natural, earth-mined stones using common gemological tools.

A comprehensive guide to the most common gemstone treatments in the lapidary world. Learn how heat, irradiation, and fracture filling affect the value and durability of colored stones.

Dive into the vibrant, banded world of Malachite. Learn how this copper carbonate mineral forms, its rich history, and the crucial safety steps required to cut and polish it.

Everything you need to know about Tanzanite, the mesmerizing blue-violet gemstone found in only one tiny location on Earth, and why it's considered a 'one-generation' gem.

Explore the fascinating geological origin, violent historical journey, and the legendary alleged curse surrounding the world's most famous blue diamond.

Get closer to your gems. Learn how to use a jeweler's loupe and a darkfield microscope to discover amazing 'worlds within worlds' trapped inside natural crystals.

Is it a real gemstone or is it lab-grown? Explore the fascinating methods of gemstone synthesis and learn how gemologists spot the microscopic differences between nature's work and human science.

Explore the fiery heart of the ruby. From the legendary 'Pigeon Blood' red of the Burmese mines to the physics of UV fluorescence, learn why rubies remain the most valuable colored gemstones on Earth.

Think sapphires are only blue? Discover the world of Padparadscha, Peach, and Teal sapphires. Learn about the chemical magic that creates every color of the rainbow in the corundum family.

Explore the mesmerizing green world of emeralds. From the violent geology of the Colombian Andes to the royal history of Cleopatra, learn what makes emerald the most coveted variety of beryl.

Learn the absolute best practices for cleaning, storing, and maintaining your loose gemstones and lapidary creations to prevent scratches and chemical damage.

Opals are the most colorful and fragile gemstones on Earth. Discover the difference between Black Opals, Boulder Opals, and Crystal Opals, and learn how to care for them properly.

Understand the distinction between precious and semi-precious gemstones — where the classification came from, why modern gemologists consider it misleading, and how gemstone value is actually determined.

Explore the world of agates — from banded and moss agate to fire agate and Lake Superior agate. Learn to identify different varieties, understand how agates form, and discover tips for building your collection.

Compare natural diamonds, moissanite, and lab-grown diamonds side by side. Understand the differences in brilliance, hardness, price, ethics, and durability to make an informed choice for your jewelry.

Discover the birthstone for every month of the year. Learn the history, geological properties, symbolism, and care tips for each birthstone — from January's garnet to December's tanzanite.

Explore the incredible world of quartz varieties — from amethyst and citrine to chalcedony, agate, and jasper. Learn about the properties, formation, and significance of every major quartz type.

Learn how to identify gemstones at home using simple tools and techniques. From scratch tests and streak tests to examining luster, color, and crystal structure — discover practical methods to determine what stones you have.

From the legendary Blue Diamond to the elusive Taaffeite, explore the ten most valuable gemstones on Earth and discover the geological rarity, optical phenomena, and market forces that make each one extraordinary.