Where To Buy — Rubidium

Rubidium is a highly reactive alkali metal, so you won’t find it at a local hardware store. Because it can ignite spontaneously in air and reacts violently with water, its sale is strictly regulated and requires specialized shipping.

If you are a hobbyist looking for a small, "display-safe" sample (usually sealed in a glass ampoule under argon gas), these sites are your best bet: where to buy rubidium

Some regions have strict regulations on shipping reactive metals to residential addresses. Rubidium is a highly reactive alkali metal, so