Gemstone Knowledge
SOOKJAI KNOWLEDGE
Gemstone Knowledge
A considered guide to gemstones — from colour and cut to origin, treatment and the stories behind each stone.
Sapphire · Colour
Padparadscha Sapphire: Understanding One of Sapphire’s Rarest Colours
Padparadscha describes a rare pink-and-orange colour range in sapphire, but not every peach or salmon sapphire qualifies. Learn what the term means, why laboratory criteria and colour stability matter, and how to read a Padparadscha claim.
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Sapphire · Colour
Royal Blue Sapphire: What Does the Name Actually Mean?
Royal Blue is one of sapphire’s best-known trade colour names, but it is not a universal grade. Learn what the term describes, why laboratory criteria matter, and what the name does—and does not—tell you about a sapphire.
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Sapphire · Treatment
Heated vs Unheated Sapphire: What Does It Really Mean?
Heated and unheated describe treatment history, not whether a sapphire is real or beautiful. Learn why sapphire is heated, what a no-heat result means, how laboratories assess treatment, and why disclosure matters.
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Sapphire · Colour
How to Choose a Blue Sapphire
Choosing a blue sapphire is not about finding one universally better shade. Explore how different blue characters feel, how they work with jewelry and metals, and how to choose a sapphire that suits the way you want to wear it.
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Sapphire · Colour
Sapphire Colours: From Blue to Pink, Yellow and Beyond
Explore the colour range of sapphire, from familiar blues to pink, yellow, green and other hues, and understand how hue, tone and saturation shape what we see.
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Sapphire
What Is Sapphire? A Complete Guide to the Gemstone
An introduction to sapphire: what it is, why it appears in so many colours, how colour, clarity, cut and treatment shape its appearance, and why it remains one of the most enduring gemstones for jewelry.
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