Gemstone Knowledge
SOOKJAI KNOWLEDGE
Gemstone Knowledge
A considered guide to gemstones — from colour and cut to origin, treatment and the stories behind each stone.
Colour · Garnet
Mali Garnet: Where Green, Yellow and Gold Come Together
Mali garnet occupies a natural meeting place between grossular and andradite, with colours that move through green, yellow, olive and gold rather than belonging to a single shade.
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Colour · Garnet
Rhodolite Garnet: Where Red, Pink and Purple Meet
Rhodolite garnet lives in the meeting place between red, pink and purple, with a colour identity that mirrors the continuous pyrope–almandine chemistry behind the stone.
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Colour · Garnet
Spessartine Garnet: From Mandarin Orange to Warm Red-Orange
Spessartine garnet spans a warm world of colour, from golden and vivid mandarin-like orange to deeper red-orange, revealing far more than a single celebrated trade colour.
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Colour · Garnet
Demantoid Garnet: Green Garnet with Exceptional Fire
Demantoid is the green variety of andradite garnet, distinguished by exceptional dispersion that brings spectral fire into conversation with its green body colour.
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Colour · Garnet
Tsavorite Garnet: The Vivid Green Side of Garnet
Tsavorite is the vivid green variety of grossular garnet, shaped by unusual East African geology and a gemstone identity far younger than the rocks that created it.
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Colour · Garnet
Garnet Colours: From Deep Red to Vivid Green and Orange
Garnet reaches far beyond its familiar deep red, opening into purple-red, orange, yellow, vivid green, unusual blue and even colour-changing appearances.
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Garnet
What Is Garnet? More Than Just a Red Gemstone
Garnet is not one red gemstone but a family of closely related minerals spanning red, orange, purple, green, yellow and even colour-changing varieties.
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Zircon · The Sookjai Perspective
Why Zircon Deserves More Attention in Fine Jewelry
Zircon has its own colour, fire, history and design potential. Seeing it clearly in fine jewelry begins by treating it as an intentional gemstone choice rather than a substitute for something else.
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Zircon · From Rough to Cut
Zircon: One of Earth’s Oldest Gemstones
Some zircon crystals preserve a record reaching back about 4.4 billion years, making this gemstone mineral an extraordinary witness to the earliest chapters of Earth’s history.
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Zircon · The Sookjai Perspective
The Sookjai Perspective: What We Look for in a Zircon
How Sookjai approaches zircon: beginning with colour, then considering light, cut, clarity, condition, treatment, wearability and the individual character that makes a stone feel complete.
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Colour · Zircon
Green Zircon: An Unexpected Side of Zircon
Green zircon reveals an unexpected side of the mineral, where colour can intersect with crystal structure, radiation history, geological time and the distinctive way zircon handles light.
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Zircon
Why Does Zircon Sparkle So Much?
Zircon’s lively sparkle comes from more than one optical effect. Refractive power, luster, dispersion, double refraction, cutting and movement all shape the way light behaves inside the gemstone.
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