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Calibrated · Loose Sapphire
Natural Blue Star Sapphire Diffused 9x7mm - 12x10mm Oval Cabochon Loose Gemstone
Sold per stone. Pick a size; the price drops as you add more of the same stone.
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- Shape
- Oval
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About these stones
Natural Blue Star Sapphire – Diffused
Discover the distinctive beauty of a Natural Blue Star Sapphire (Diffused), featuring a smooth cabochon surface and a captivating star effect that appears across the stone when viewed under a direct light source.
These sapphires are natural sapphires that have undergone diffusion treatment to enhance or create the desired color and star phenomenon. “Diffused” refers to the treatment and is clearly disclosed in this listing.
Available in various sizes from approximately 9mm to 12 × 10mm, making these stones suitable for jewelry projects, including rings, pendants, earrings, and custom designs.
Product Highlights
Gemstone: Natural Blue Star Sapphire
Treatment: Diffused
Color: Blue
Phenomenon: Star / Asterism
Shape: Oval / Cabochon
Size: Approximately 9mm – 12 × 10mm
Transparency: Opaque to translucent, depending on the stone
Finish: Smooth polished cabochon
Origin: Varies
Quantity: 1 loose gemstone
Important Treatment Disclosure
This is a natural sapphire that has been diffusion treated. Diffusion treatment is a recognized gemstone treatment used to alter or enhance the appearance of sapphire. Please consider this information when purchasing.
Each stone is unique, and the color, star visibility, pattern, and appearance may vary from one gemstone to another.
Perfect For
Custom gemstone jewelry
Sapphire rings
Pendant designs
Earrings
Collector specimens
Jewelry designers and makers
Birthstone jewelry projects
Please select your preferred size from the available options.
How we grade
A: lighter colour, visible inclusions. Good for fashion pieces and practice settings.
AA: even colour, some inclusions you can see up close. Everyday jewelry.
AAA: rich colour, eye clean. Fine jewelry.
AAAA: the top colour we cut, eye clean. Statement and heirloom pieces.
Market Basics or Precision
Market Basics: good outlines; sizes and depths vary a little stone to stone. Best value for settings you adjust by hand.
Precision: even outlines and matched depths. Drops into pre-notched castings and lines up in rows and halos.