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Home > Blue Chalcedony > 5 Ways to Tell if blue Chalcedony is Real

5 Ways to Tell if blue Chalcedony is Real

Blue Chalcedony is occasionally mimicked by Glass, Dyed Quartzite, and plastic. It's advisable to buy from reputable retailers and, if possible, request a certificate from a gem testing laboratory for authentication. Here are some handy tips to help you initially discern the authenticity of blue Chalcedony.

1. Check the Color

Real: Real Blue Chalcedony typically ranges from light to medium blue, often described as pale blue to sky blue.
Fake: Fake Blue Chalcedony made from dyed quartzite is often dyed vibrant neon blue. Upon careful observation under light, you will notice that dyed quartzite shows dye concentrations in fractures.

2. Hardness Test

Real: Real Blue Chalcedony cannot be scratched by a steel nail. After a period of use, real Blue Chalcedony typically doesn't exhibit noticeable wear.
Fake: Fake Blue Chalcedony made from glass or plastic can be scratched by a steel nail. After a period of use, these low-hardness fakes will show obvious wear and gradually lose their original luster.

3. Touch Test

Real: Real Blue Chalcedony feels cold to the touch.
Fake: Plastic-made fakes feel warm to the touch.

4. Inspect the Inclusions

Real: Real Blue Chalcedony often contains no round bubbles or swirl marks.
Fake: Sometimes gas bubbles, or even swirl marks may be observed in glass-made fakes.

5. Acetone Test

Real: Rubbing the real Blue Chalcedony with nail polish remover (acetone/ethyl alcohol) won't cause the stone to fade.
Fake: Swabbing the dyed fakes with a Q-tip and some nail polish remover (acetone/ethyl alcohol) might cause the stone to fade. This method may not be effective for some dyed fakes with better colorfastness.
Blue Chalcedony
Blue Chalcedony
A species of Chalcedony
Scientific name: Blue Chalcedony
Mineral Variety: Chalcedony
Description
Description
Blue Chalcedony is a highly prized gemstone. The blue variety of Chalcedony occurs only when it does not contain many color-changing impurities. This stone is perfect for carving, cutting, crafting, and tumbling, and its rarity may explain why so many Chalcedonies are artificially colored for the market. The most valuable natural specimens of blue Chalcedony bend the light in such a way that they appear to be lit from within.
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