The specimen is from Rio Grande de Sul, Brazil. The crystal portion of the specimen is calcite, which has a clear to milky appearance under normal light, and clear to milky quartz. The matrix is white to tan in color and does not fluoresce.
The first photo was taken under short wave ultra-violet light. The calcite fluoresces a red-orange.
The photo below shows the specimen under long wave ultra-violet light. The specimen fluoresces a light lavender to white.
To see a photo of this or other specimen material from Brazil, under normal light, return to the main fluorescent page and click on the link "To view specimen material from Brazil."
Calcite and quartz 
Quantity in Basket: None
Code: BCQ-101
Price: $36.00
Shipping Weight: 0.83 pounds
Location: Rio Grande de Sul, Brazil
Minerals: Calcite & quartz
Size: 4-1/4" x 3-1/2" x 1-3/8"