apatite with feldspar

Apatite fluoresces yellow under short wave UV due to the presence of foreign ions. Most likely the activator is divalent manganese substituting for calcium. In some cases, however, dysprosium can cause the same fluorescence.

I used a Superbright SW 2000 as illumination (go see www.uvsystems.com/checkout/agora.cgi?p_id=3_2&xm=on)

Done