Bismuth

Bismuth is a brittle, crystalline, white metal with a slight pink tinge. It has a variety of uses, including cosmetics, alloys, fire extinguishers and ammunition. It is probably best known as the main ingredient in stomach ache remedies such as Pepto-Bismol.

Available at World of Science supplies:

BISMUTH AA STANDARD 1000ppm (in 0.5N HNO3)
BISMUTH ICP-OES & ICP-MS STANDARD 1000ppm
BISMUTH NITRATE 0.01M