1 Sapphire blue is a cool color. 2  Sapphire carries the blue symbolism of importance and confidence. 3  Although it's not a light or pastel blue, it still has something of a fresh, spring-like quality with a touch of childlike playfulness.
Sedimentary rocks make up only 5% (by volume) of the upper 10 miles of the crust, but about 75% of the outcrops on the continents. Two primary types of sedimentary rocks: 1  Chemical-precipitate from solution (e.g., limestone); most important constituents are calcite, dolomite, chalcedony (SiO2), gypsum, and halite.2  Chemical sedimentary rocks can be further divided as to: 3  inorganic (e.g., limestone, rock salt, dolomite). Chemical-precipitate from solution (e.g., limestone); most important constituents are calcite, dolomite, chalcedony (SiO2), gypsum, and halite. 2  Chemical sedimentary rocks can be further divided as to: 3  inorganic (e.g., limestone, rock salt, dolomite). 4  organic (e.g., limestone or coal).
The most common clastic sedimentary rocks are breccia and conglomerate (formed from gravel), sandstone (from sand), siltstone (from silt), and shale (from clay). B. CHEMICAL SEDIMENTARY ROCKS. Chemical sedimentary rocks are crystalline, that is made of crystals interlocked with each other.ediment is a general term that indicates loose grains (such as the sand at the beach) and chemical precipitates (such as crystals of salt). Sedimentary rocks can be subdivided in three categories: clastic, chemical, and biochemical sedimentary rocks.