Appetite nuggets gemstone Plain Features:
Bead, blue apatite (natural). Sold per 15-inch strand.
Asymmetrical nugget beads bring an artistic edge to contemporary jewelry designs. Contrasting hues of dark blue and teal green with opaque translucency and matte polish.
ABOUT Appetite Plain:
Shape: Bead (round in shape with a small hole in the center)
No of beads: 200 - 240 beads on a string
Length: 16 inches long
What is Apatite?
Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite, and chlorapatite, named for high concentrations of OH−, F−, or Cl− ions, respectively, in the crystal. The formula of the admixture of the three most common endmembers is written as Ca5(PO4)3(OH, F, Cl), and the formulae of the individual minerals are written as Ca5(PO4)3(OH), Ca5(PO4)3F and Ca5(PO4)3Cl, respectively.
Apatite is one of few minerals that are produced and used by biological micro-environmental systems. Apatite has a Moh's Scale hardness of 5. Hydroxylapatite is the major component of tooth enamel. A relatively rare form of apatite in which most of the OH groups are absent and containing many carbonate and acid phosphate substitutions is a large component of bone material.
Fluorapatite (or fluoroapatite) is more resistant to acid attack than is hydroxyapatite. For this reason, toothpaste typically contain a source of fluoride anions (e.g. sodium fluoride, sodium monofluorophosphate). Similarly, fluoridated water allows exchange in the teeth of fluoride ions for hydroxyl groups in apatite. Too much fluoride results in dental fluorosis and/or skeletal fluorosis.
In the United States, apatite is often used to fertilize tobacco. It partially starves the plant of nitrogen, which gives American cigarettes a different taste from those of other countries. Fission tracks in apatite are commonly used to determine the thermal history of orogenic (mountain) belts and of sediments in sedimentary basins. (U-Th)/He dating of apatite is also well-established for use in determining thermal histories and other, less typical applications such as paleo-wildfire dating. Phosphorite is a phosphate-rich sedimentary rock, that contains between 18% and 40% P2O5. The apatite in phosphorite is present as cryptocrystalline masses referred to as collophane.
Apatite, a stone seldom found in jewelry stores and virtually unknown to the general public, is beloved by collectors for its many different colors and forms. Only with the recent availability of the neon blue-green variety from Madagascar, has its jewelry use increased. The color of the best specimens of this type rivals the famed Paraiba tourmalines, but alas, this gem lacks their toughness and hardness. At 5 on the Mohs scale, apatite must be cut, set, and worn gently. Earrings, pendants, pins, and tie tacks are probably safe, but ring use should be limited to occasional wear pieces with protective settings. Care for this stone is similar to that given opals, it is heat and shock sensitive, so steamers and ultrasonics must be avoided. Gems are available in yellows and various shades of blues and greens. Some of the blues show chatoyancy and can be cut as cat's eyes. Main sources are Brazil, Canada, India, Mozambique, and Madagascar.
The major sources listing values for gems do not yet catalog the blue-green variety so I have extrapolated from the data available on the other colors. Sinkankas lists fine blue stones of between .5 to 1.5 ct at $75 to $200 per carat. His estimate for blue Brazilian stones is $100/ct. The rarest of all varieties, a rich purple from Maine, tops the list at $250 per carat. The degree of polish can vary on this soft stone due to skill levels of individual cutters, giving well polished stones premium value. As with most gems, saturation of color, size, and clarity are the major determiners of value.
Nuggets beads are common in freakers and fashion lovers. Nuggets beads are weared very casually by girls.