Jasper Jasper Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases, is an opaque, impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. The mineral aggregate breaks with a smooth surface and is used for ornamentation or as a gemstone. It can be highly polished and is used for items such as vases, seals, and snuff boxes. The specific gravity of jasper is typically 2.5 to 2.9. A green variety with red spots, known as heliotrope (bloodstone), is one of the traditional birthstones
Spa (mineral water) "Spa red") is a generic term for sparkling water, as the label for sparkling Spa is red. Likewise, "Spa blauw" (pronounced "spah blow" (rhyming with "cow"), and meaning "Spa blue") is a generic term for still (non-carbonated) mineral water, as the label for non-carbonated Spa is blue. In a Dutch restaurant, for example, if a customer wishes sparkling mineral water, he will most commonly ask for "Spa rood". Generally, the waiter would not expect that the customer wants Spa brand specifically, nor would the customer expect Spa specifically. In some cases, customers even refer to tap water as "Spa grey."