Sapphire Centre
What Determines the Price of a Sapphire?
The factors that set sapphire prices, colour, clarity, cut, carat weight, treatment status, origin and documentation, and how they interact.
3 min read
Sapphire Centre
The complete hub for sapphire knowledge: colours, clarity, cut, carat weight, price factors, heated versus unheated stones, origin reports and how to buy a sapphire with confidence.
All Guides in This Section
Sapphire Centre
What Is a Sapphire Origin Report?
How laboratories form opinions on where a sapphire was mined, why origin conclusions are opinions rather than guarantees, and how to use them when buying.
3 min read
Sapphire Centre
What Are the Inclusions Found in Sapphires?
A guide to sapphire inclusions, silk, crystals, fingerprints and zoning, and how these internal features reveal origin, treatment and authenticity.
3 min read
Sapphire Centre
What Colours Do Sapphires Come In?
A guide to the full range of sapphire colours, blue, yellow, pink, padparadscha and more, and how hue, tone and saturation shape beauty and value.
3 min read
Sapphire Centre
How Should You Care for a Sapphire?
How to clean, wear and store sapphire jewellery safely, including the extra care rules for fracture-filled, diffusion-treated and star sapphires.
3 min read
Sapphire Centre
How Does Carat Weight Affect a Sapphire?
What carat weight really means for sapphires, weight versus face-up size, price-per-carat thresholds and how to compare stones sensibly.
3 min read
Sapphire Centre
What Exactly Is a Padparadscha Sapphire?
How padparadscha is defined, why laboratories draw its pink-orange boundaries differently, and why treatment disclosure matters so much in this rare variety.
3 min read
Sapphire Centre
Natural vs Synthetic Sapphire: How Do They Differ?
The real differences between natural and synthetic sapphire, how lab-grown corundum is made, how gemmologists tell them apart and what each is worth.
3 min read
Sapphire Centre
Heated vs Unheated Sapphire: What Is the Difference?
How heat treatment changes sapphires, how laboratories detect it, why unheated stones carry premiums and what disclosure you should insist on.
4 min read
Sapphire Centre
What Is a Fracture-Filled Sapphire?
How fracture filling with glass disguises breaks in corundum, the signs laboratories look for, and why filled stones need careful handling and full disclosure.
3 min read
Sapphire Centre
What Is a Diffusion-Treated Sapphire?
How titanium and beryllium diffusion treatments colour sapphires, how laboratories detect them, and why disclosure and pricing differ so sharply.
3 min read
Sapphire Centre
How Do You Buy a Loose Sapphire?
A practical process for buying a loose sapphire, examining the stone, questioning the seller, verifying claims and securing the right documents.
3 min read
Sapphire Centre
Sapphire vs Spinel: How to Tell Two Classic Blue Gems Apart
Sapphire and spinel are different minerals with different optics, hardness and prices. What separates them, why they get confused, and how laboratories tell them apart.
3 min read
Sapphire Centre
What Is a Star Sapphire?
How star sapphires form, why the star moves, how to judge a fine star and body colour, and the treatments and synthetics buyers should know about.
3 min read
Sapphire Centre
Why Does Cut Matter So Much in a Sapphire?
How sapphire cutting works, colour orientation, pleochroism, windows, extinction and cabochons, and how to judge whether a stone is well cut.
3 min read
Sapphire Centre
How Is Sapphire Clarity Judged?
How clarity works in sapphires, the eye-clean standard, common inclusions, silk, and when internal features lower value or actually add to it.
3 min read
