The puffy heart made of lapis lazuli is about 50 x 55mm.
The name Lapis Lazuli is derived from the Latin words "lapis" (stone) and lazulum (blue). Different spellings like lapis lazuli, lapis lazuli or lapis lazuli are not correct. Due to the long fame of lapis lazuli, there are numerous synonyms. These include azure d'acre, azurum ultramarinum, bleu d'azure, lapis lazuli ultramarine, lazure stone/lazure stone, lazurium, oltremare, oriental blue, outremer lapis, pierre d'azure, ultramarine genuine, ultramarine ino/verdadero, ultramarine natural scythium. Lapis Lazuli was used in ancient Egypt in the death masks of pharaohs; therefore, the dark blue stone is also called pharaoh stone.