Calcite – Eskifjordur, Iceland. This remote area of Iceland is the type locality for the Iceland Spar variety of calcite (CaCO3;
type locality is the place where a mineral or rock best exemplifies its standard description, often where it was first discovered). Iceland Spar calcite is exceptionally clear and optically transparent, whereas other types of calcite can have a wide range of colors and translucencies (see photo in the Problem 10 placemark). Given this, which of the following is not a diagnostic property for calcite? a. cleavage at three directions not at ~90°.
b. hardness of 3.
c. color.
d. effervesces (forms CO2 bubbles) with hydrochloric acid.
Calcite is a carbonate mineral which is found in different countries and has over 800 different forms. Calcite has cleavage at three directions which forms rhombic shape but the angles is not 90 degrees. It has hardness of 2 and is effervesces with hydrochloric acid. Color is not a diagnostic property of Calcite.
The feeding habits of the society will change. The society will generally start moving away from eating raw oyster to embracing cooked oysters. In addition , people in the society will shun eating the oysters during the warm months of April and November and therefore fishing for the oysters during these months may decline.
As some of the scientific theorists state that the primate's ancestor first migrated from the Africa and they crossed the Atlantic vegetation and rafted themselves across the land bridge and later submerged and later got isolated and they broke off.