Sulfate
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Compounds & Effects - Copper Sulfate
May cause irritation of the skin, eyes, nose, and throat. Ingestion can cause gastrointestinal irritation, vomiting, or anemia.
Jewelry Frequently Asked Questions
How can I test pearls and care for them?
Sulfate Minerals
Sulfate minerals form near the Earth's surface.
Sulfide Minerals
Pictures of these important ore minerals and collectibles.
Sulfate: A salt containing sulfur dioxide.
Sulfur: An abundant, pale yellow, nonmetallic element used in black gunpowder, rubber vulcanization, the manufacture of insecticides and pharmaceuticals, ...
Sulfates
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The sulfur anion (S2-) may bond to a positive metallic or semimetallic ion, receiving two electrons in order to fill its valence shell. Mineral species of the sulfide class are compounds of this nature.
SulfateAlabaster
CaSO4 - 2H2O
Other names/forms:
Gypsum
Most distinguishing features:
Identified by hardness and good cleavage.
1.5.7. Sulfates. These minerals contain SO42- as the major polyanion in which S6+ is surrounded by four oxygen atoms in a tetrahedron. Note that this group is distinct from sulfides which contain no O. A familiar example is gypsum (CaSO4 2H2O).
Pb SO4 Lead Sulfate
Color(s):
Colorless, yellow, gray, pale green, and sometimes blue ...
hydrous sulfate of aluminum and potassium: KAl3(SO4)2(OH)6
Crystallography: Hexagonal, usually massive crystals are rare
Colors: white, gray, pink
Luster: vitreous to pearly,translucent to transparent Hardness: 3.5 - 4
Specific gravity: 2.6 - 2.9 ...
AngeliteAngelite (CaSO4); it is a pale blue variety of calicium sulfate = anhydrate (it is gypsum that has lost water and crystallized). The stone is quite brittle; crystals are transparent to transluscent. Angelite stone has a hardness of 3 to 3.
sulfates Group of minerals that contains one or more metallic element in addition to the sulfate radical (SO4). All sulfates are transparent to translucent and soft. Most are heavy and lightly colored, and some are soluble in water.
Sulfates - Minerals containing the sulfate (S04) radical as a major component. (Gypsum, Barite)
Sulfides - Minerals which are compounds of a metallic element with sulfur.
Many such pickling solutions are used, from vinegar and salt to the jeweller's standard pickle, Sparex®, which is sodium bisulfate and is often sold as 'swimming pool acid'.
Basic types of sedimentary rock are gypsum (sulfate from evaporating sea water), limestone (calcite from sea shells and sea beds), sandstone (feldspar, quartz), shale (clay), and conglomerates (sand and pebbles, bonded with dissolved minerals).
Gypsum: A soft, white mineral composed of hydrous sulfate of lime. It is used as plaster of Paris.
Gypsy setting: A setting in which the surface of the mount is virtually flush with the top of the gemstone.
Angelite: A pale blue variety of calcium sulfate. (A gypsum that has lost water and ><>< transparent to translucent).
Angelskin Coral: A highly valued pale pink coral.
Verdigris - a green crust or patina of copper sulfate or copper chloride formed on copper, brass, and bronze because of exposure to air or sea water over a long period.
Vermeil - silver that has been gilded.
This new type of tourmaline, which soon became known as Paraiba tourmaline, came in incredibly vivid blues and greens, due to copper sulfate added to a tiny amount of gold as coloring agent.
The other type of change in color is noticed by the existence of artificial light, natural light, fluorescent light or even incandescent light. This type of change in color is noticed in nickel sulfate making it look like Alexandrite, ...
Oxidized ore
the alteration of metalliferous minerals by weathering and the action of surface waters and their conversion, partly or wholly into oxides, carbonates or sulfates
P ...
Barite was present in one specimen at Philips Mine found as amygdaloidal form in altered rock. This nodule contained minute grains of pyrite and was coated with a thin blue crust, apparently a copper sulfate.
Likewise ocean water or other brines can evaporate as climate changes leaving behind dissolved minerals, like halite (the mineral name for sodium chloride, table salt). Other waters containing sulfur may evaporate, and leave behind sulfate minerals ...
 See also: Table, Stone, Color, Sulfur, Make
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