Photo credit: geologyin.com
Neither a stone nor a rose, a phenomenon found in Mexico and Tunisia (and, less commonly, in Arizona) is known as a “stone rose.” Formed from either gypsum or barite, these roses are produced as a result of evaporation when one or the other of these minerals binds with grains of sand in an arid, salt-rich environment.
With an average size of 10 centimeters (4 in) per petal, these roselike formations range in color that is directly related to how they were formed. The ones made in shallower locations typically produce amber petals, whereas deeper formations in a wider space often produce yellow or clear petals.
The unique shape of these roses is not the only unusual thing about them. Regardless of their color during the day or where they developed, all will glow the same opaque white color when placed under an ultraviolet light.
I'll admit, the thing is very pretty. I'd love to see one in person.
Let's take a chance and have coffee out on the patio this morning.