Gemstone Learning Center

Heat Treatment in Natural Gemstones: What It Changes and Why It Matters.
Heat Treatment in Natural Gemstones: What It Changes and Why It Matters.
Heat treatment has been used for centuries to alter or improve the appearance of natural gemstones, but not every heated stone—or every type of heating—is the same. Explore how heat... Read more...
Choosing a Gemstone for a Custom Ring or Pendant
Choosing a Gemstone for a Custom Ring or Pendant
Choosing a gemstone for custom jewelry involves more than finding a color or shape you love. Learn how durability, hardness, toughness, cleavage, inclusions, treatments, cut, dimensions, setting style and your... Read more...
Natural Gemstone Treatments Guide: What Buyers Should Know
Natural Gemstone Treatments Guide: What Buyers Should Know
Natural gemstones are often treated to improve color, clarity or overall appearance. Learn what common treatments mean, how they may affect value and care, and why clear disclosure matters when... Read more...
Gemstone Durability Guide: Hardness, Toughness, Stability and Cleavage
Gemstone Durability Guide: Hardness, Toughness, Stability and Cleavage
Gemstone durability involves more than a Mohs hardness number. Learn how hardness, toughness, stability, cleavage, inclusions and setting design work together when choosing a gemstone for a ring, pendant or... Read more...
Surface Reaching Inclusions in Natural Gemstones: What Buyers Should Know
Surface Reaching Inclusions in Natural Gemstones: What Buyers Should Know
Surface reaching inclusions are a natural part of many gemstones and do not automatically indicate damage or poor quality. Learn how these features form, when they matter, how they can... Read more...
Natural Gemstone Inclusions Guide: Understanding the Beauty Within Natural Gemstones
Natural Gemstone Inclusions Guide: Understanding the Beauty Within Natural Gemstones
Natural gemstone inclusions are more than imperfections. They can preserve evidence of crystal growth, reveal fascinating internal landscapes, influence beauty and clarity, and sometimes help gemologists understand a gemstone’s history.... Read more...
June Collective gemstone cut guide featuring round, oval, cushion, emerald, radiant, pear and specialty gemstone shapes with faceted natural gemstones displayed in a luxury editorial setting.
Gemstone Cut Guide: Shapes, Styles and How to Choose
A complete guide to gemstone cuts and shapes, from round, oval and cushion to emerald, radiant, pear and specialty cuts. Learn how cut affects brilliance, color, proportions, face up size,... Read more...
Luxury Gemstone Color Guide by June Collective explaining hue, tone and saturation with colorful faceted gemstones arranged from red and orange to yellow, green, blue and purple.
Gemstone Color Guide: Understanding Hue, Tone and Saturation
Learn how hue, tone and saturation work together to create gemstone color. This complete guide explains primary and secondary hues, light and dark tone, color saturation, lighting, cutting and how... Read more...
Natural Sapphire Buying Guide
Natural Sapphire Buying Guide
Discover how to evaluate and buy natural sapphire with confidence. Explore blue and fancy sapphire colors, clarity, cut, treatments, unheated sapphire, certification, value, jewelry suitability and proper care. Read more...
Gemstone Buying Guide: How to Choose a Natural Gemstone
Gemstone Buying Guide: How to Choose a Natural Gemstone
Learn how to choose a natural gemstone with confidence. Explore color, clarity, cut, carat weight, treatments, durability, laboratory reports, and essential buying tips for collectors, jewelry lovers, and custom jewelry... Read more...
Natural Tourmaline Buying Guide
Natural Tourmaline Buying Guide
Discover how to evaluate and buy natural tourmaline with confidence, from color, clarity and cut to treatments, rarity, value and proper gemstone care. This complete June Collective guide explores pink,... Read more...
Natural Spinel Buying Guide by June Collective
Everything you need to know...
Discover how to evaluate and buy natural spinel with confidence, from color, clarity and cut to treatments, rarity, value and proper gemstone care. Read more...