Endive is also a common name for some types of chicory (Cichorium intybus). There are two main varieties of cultivated endive: 1  Curly endive, or frisee (frisÃ©e var). 2  Crispum this type has, narrow, green curly outer.  leaves
Calcite is more stable and common than aragonite under the chemistry of our modern seas.) Hardness 3 (down to 2. but also the ease with which it forms. in the form of marble.5 to 4. Calcite forms in a range of settings from hot springs and underground caverns to growing coral reefs and seashells.
Other minerals frequently pseudomorph Aragonite. Calcite commonly pseudomorphs after Aragonite, and although it contains the same chemical composition and crystal forms as Aragonite, it is really Calcite. There are many Aragonite crystals sold to collectors that are in fact really Calcite pseudomorphs after Aragonite.