Jasper Jewelry

Where the name comes from: Old French jaspre meaning spotted or speckled stone.
Where the stones come from: Found worldwide.
Chemistry: Silicon dioxide, a form of chalcedony - SiO₂
Colors: Red, yellow, brown or green, occasionally and rarely blue.
...and another thing: In the ancient world jasper was usually considered as being green, possibly including other stones that we would now consider to be different kinds of gemstones.
 

Prices correct at time of writing - subject to change