• Nano Gems - Dark Blue Sapphire - Round
  • video Cool Tools | Nano Gems Introduction by Deb DeWolff
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Nano Gems - Dark Blue Sapphire - Round

Nano Gems - Dark Blue Sapphire - Round

ZAN-305

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Made in China

$7.00 USD
$7.00 USD
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Nano Gems

Nano Crystals are a type of created gemstone made especially for jewelry. The color is homogeneous, meaning that if you bought 100 emerald green nano gemstones, the color would be exactly the same in every stone.

Nano Gems are safe to fire up to 1675°F / 913°C on an open shelf in silver clay, with the exception of the Dark Orange and Orange, which can safely be fired up to 1650°F / 899°C on an open shelf in silver clay. Torch firing is safe for stones 4mm or smaller.

It is very important to fire with an azure, or a hole for light to pass through, behind the gem. The size of the azure should be slightly smaller than the size of the stone. For example, a 4mm stone would benefit from a 3.5mm or 4mm hole. Without an azure, Nano Gems can change color, get muddy or lose luster.

For more information on our testing of Nano Gems please visit our blog post here. 

  • refractive index 1.5 – 1.7
  • density 2.7 – 3.2 g/cm3
  • Mohs scale of hardness 6.5 – 7 mohs
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    Overall rating: 4.714286 / 5 from 14 reviews.

    AI Generated Review Summary

    Summary topics

    Review topics: [color, service, gems].

    Review highlights

    Reviews

    Very pretty

    "Nice shine and color"

    — Florencia C. (5/5)

    True dark blue color

    "This blue stone held up well under firing and is a gorgeous dark blue color that contrasts beautifully with silver."

    — Ann C. (5/5)

    Molds

    "Great molds for clay. Very realistic. Fast service."

    — Nikolei R. (5/5)

    Gorgeous color!

    "Gorgeous color!"

    — Carolyn P. (5/5)

    These are beautiful

    "2nd time I’ve ordered these. They look like sapphires. Probably the only artificial gem I’ve used that looks like the real thing."

    — Gianine C. (5/5)

    Reliable, quality products great customer service

    "Nano gems are amazing it's hard to find a blue that will stay true this was perfect. The color stayed great through firing and was very beautiful."

    — Arlesienne S. (5/5)

    Nice color

    "Beautiful, rich blue color. Pretty gem!"

    — Eve (5/5)

    Changes color to a dark bluish green

    "I tried this stone and it came out beautiful so I ordered more. The next time it changed colors ruining my piece. I called to find out if anyone else had complained of this and was told “no”, my kiln was probably too hot to which I replied it was new. . I since have found out through others that is not so. They too called to complain. Cool tools graciously send me more however in using the replacement I got the same result. I do not recommend this and am sad I wasn’t told that there had been others. Cool tools needs to re check the temps of these stones."

    — Nancy H. (1/5)

    Nice Deep blue

    "Love them. Such Color it’s blinding. ."

    — Joshua B. (5/5)

    Rich color

    "I love these nano gems! Ruch color and safely fire in place. I would love to see these available in pear/teardrop shape as well."

    — Karen H. (5/5)

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