Opal is an October birthstone.
OPAL multi-purpose reactor
There are a number of processes used to alter the color, apparent clarity, or improve the durability of gems. Some gemstones have synthetic counterparts that have essentially the same chemical, physical, and optical properties, but are grown by man in a laboratory. Any gem can be imitated—sometimes by manmade materials or by natural materials chosen by man to impersonate a particular gem.
When opal formed, silica gel filled crevices in rock. As water evaporates, the silica is deposited in the form of tiny spheres.
No two opals are exactly alike. Dazzling brilliance.
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Captivating color. Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.
Citrine is the transparent, pale yellow to brownish orange variety of quartz. Back to gem encyclopedia Opal Fireworks.
Unique Beauty. Hidden Beauty.
Rare Phenomena. About Opal View Gallery. Treatments There are a number of processes used to alter the color, apparent clarity, or improve the durability of gems.
Find out more. Our booklet will tell you all you need to know about the UK's only proven programme for supporting school improvement through play. Our work is backed up by research undertaken by respected institutions and councils, highlighting the benefits of proper play management.
More active, confident and socially adept children results in better behaviour. We work with you to help your children settle into lessons quicker and be more engaged, boosting school performance.
'Final piece of the puzzle': Opal cards no longer required for Sydney transport
We'll show you how to reclaim staff time for teaching After working with us, children are able to accrue cognitive, emotional e. Our experienced team will be able to help you create happier playtimes, create better play spaces and enable staff to support wonderful play through our OPAL Primary Programme and our design and advice services. We create happier playtimes, better play spaces and enable staff to support outdoor learning.