Topaz specimen from Brazil

  • Updated
    26/06/26
  • Read time
    2 minutes
Topaz D.35797 Click to enlarge image
Brazil 12 x 17.5 x 17.5 cm Registered 1941 D.35797 Image: Stuart Humphreys
© Australian Museum

This huge, clear topaz crystal weighing 5.5 kg has a perfect and sharp crystal shape (orthorhombic crystal system) with a diamond-shaped cross-section. It was mined from a prominent Brazilian pegmatite deposit. Its chemical composition is aluminium fluorine silicate.

Specimen details

  • Origin

    Brazil

  • Size

    12 cm x 17.5 cm x 17.5 cm

  • Date

    Registered 1941

  • Collection number

    D.35797.

How it became part of the AM Mineralogy Collection

This specimen has been on continuous display in successive mineral exhibitions since its acquisition in 1941. It was aquired through an exchange with Warner & Geiger, a Californian company supplying mineral specimens and noted for its pegmatite minerals.

A huge, clear topaz crystal with a sharp crystal shape.
Origin: Brazil Dimensions: 12 cm x 17.5 cm x 17.5 cm. Registered into the Australian Museum Collection 1941. D.35797 Image: Stuart Humphreys
© Australian Museum