Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
It's greenish yellow with white. Got it in a mixed stone package from Amazon.
No luster, I'd say a 7 in hardness, it doesn't look homogeneous.
I think your mineral specimen is smithsonite based on texture and the dark metallic specks that appear to be galena.
Probably Scottish Green Marble or Norwegian Jade (Lizardite) ... Are there any informations about the location where it was found?