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is a naturally blue stone with interior fracturing of light which results in a
play of color. Opal is October's birthstone and is believed to make the wearer
less self-conscious, thereby encouraging spontaneous action and awakening one's
- Natural opal (also known as precious opal) contains between
3-10% water but can be as high as 20% and this can make the stones less stable.
- Lab opal is considered a true synthetic or created opal – produced
in controlled laboratory conditions and with the same chemical composition as
natural opal but with a very low moisture content making it more durable. Lab
opal has much fracturing of light and brilliant colors including blue, pink, purple,
red and green. Most opal used in Native American jewelry is lab opal.
Imitation opal (artificial or simulated opal) is different chemically from
natural and lab opal. It is made up of 80% silica and 20% resin and is an economical
option to both precious and lab opal.
more about opal. Read