Blue Topaz on Albite var Cleavelandite w/ ? Inclusions - Vale do Jequitinhonha, Brazil - For inclusion: near microscopic - (0.25 mm)

Mineral: Blue Topaz on Albite var Cleavelandite w/ ? Inclusions
Locality: Virgem da Lapa, Vale do Jequitinhonha, Minas Gerais, Brazil
Dimensions: For inclusion: near microscopic - (0.25 mm)

Description: Shows the 3rd mineral magnified by 40x under a microscope inside the blue topaz. My best guess is galena which I pretty sure is correct