Bicolor sputnik aragonite, large Blue aragonite Approx size each coaster has

Approx size each coaster has a diameter of 3 2/3" and is 1/3" thick

Some surface layers are quite soft

Approx dimensions: 4 x 4 x 3"

Under closer inspection the variety displays good color zoning

I give mine pieces of limestone as a calcium supplement and they definitely use it

Bicolor sputnik aragonite, large Blue aragonite Approx size each coaster hasLocale: Morocco Approx dimensions: 4 x 2" Approx weight: 382g This variety of aragonite clusters earns its trade name from the resemblance to the Sputnik satellite, with crystals protruding out in all directions. The bicolor variety grows crystals that are red brown and a grayish white color. This lumpy ass piece looks a bit phallic from the wrong angle (I deleted a few photos ), composed of multiple spherical lumps with a pair at the base and two