Sulphur, yellow crystal fragments in vesicular lava, probably from Vesuvius, Naples, Italy.

Sulphur - a single yellow prismatic crystal - possibly from Agrigento (Girgenti), Sicily, Italy

Sulphur - bright yellow prismatic crystals encrusting matrix - from Agrigento, Sicily, Italy.

Sulphur - yellow prismatic crystals associated with calcite on matrix - from Sicily, Italy.

Sulphur - originally two containers under G.1910.10.1, now split - containing fragments of matrix infused with yellow native sulphur - Xrd: 50 confirms - taken from a burning dump at Devon Pit, near Alloa, Clackmannanshire.

Sulphur - pale yellow crusts - Xrf: Sulfur a major element - from a vug in an albite-labradorite (?) dyke found just south of the old pier at Loch Begg, near Craignish, west Argyll.

Sulphur - yellow grains from a vug in an albite-labradorite(?) dyke, altered by contact with sea water - fresh vugs have a filling of fresh labradorite with twinning - from just south of the old pier at Loch Begg, near Craignish, west Argyll.

Sulphur - pale yellow crusts - Xrf: Sulfur a major element - from a vug in an albite-labradorite (?) dyke found just south of the old pier at Loch Begg, near Craignish, west Argyll.

Sulphur - pale yellow crusts - Xrf: Sulfur a major element - from a vug in an albite-labradorite (?) dyke found just south of the old pier at Loch Begg, near Craignish, west Argyll.

Sulphur, group of yellow blocky and prismatic crystals, from Sicily, Italy.

Phoebis argante, sulphur butterfly, male, dried specimen, Paraguay

Sulphur - yellow crusts on several broken pieces of matrix - very fragile - from Emily Pit, Arniston, Midlothian

Sulphur - originally two containers under G.1910.10.1, now split - containing fragments of matrix infused with yellow native sulphur - Xrd: 50 confirms - taken from a burning dump at Devon Pit, near Alloa, Clackmannanshire.

Sulphur - yellow prismatic crystals partially encrusted by, and resting on celestine - mounted on a small card - from Sicily, Italy