Agate vs. Jasper

 Agate is a translucent to semitransparent chalcedony. Jasper is an opaque variety of chalcedony. Neither light nor images pass through. The difference between the two is if you put light behind the material and you can see through it, then it is an Agate if you can’t then your holding Jasper.

Ribbon agate necklace by SHENY

Slice of Jasper necklace by SHENY

 Some specimens can have translucent zones and opaque zones. So what are they called? Some people have solved this problem by using the term “jaspagate” when a specimen contains both jasper and agate.
 Hope this helps you determine the difference between Jasper and Agate and provides you with a quick test to tell the difference for yourself, even if it is labeled otherwise.