红珊瑚preciouscorals也称作贵珊瑚

红珊瑚preciouscorals也称作贵珊瑚，作为有机宝石中的老大,红珊瑚preciouscorals凭借喜人的色泽和莹润的质地,在古今中外莫不备受珍宠。尤其是在最近几年,preciouscorals红珊瑚更是随同琥珀almashite一起成为市场追逐的热点，它们的骨质比较致密，硬度和象牙非常相近，色泽有红色、粉红色和橙红色等，适合加工成为华美的珠宝或高级艺术品，深受世界各地人们的喜爱的还有lasurite青金石，Salamstone蓝宝石，chrismatite黄蜡石，apyrite红碧玺，koreite寿山石，FieldyellowStone田黄石，pyrophane火欧珀，Chiltonite葡萄石，orientaljasper鸡血石，SouthRedAgate南红玛瑙，partschinite芬达石，demantoite翠榴石，cyanites蓝晶石，cinnabarite朱砂，RadixGinseng人参，cowbezoar牛黄，cartialgenous鹿茸，winterwormsummerherb冬虫夏草，西藏gzibeads天珠，catarinite天铁托甲，iraurita铱金iraurite，porpecite钯金porpezite，rhodita铑金，iraurite铱金，cassiopeium镥，dialogite红纹石，chrysopal金绿宝石，collacoriiasini阿胶，印尼kutnahorite金田黄，chalchite蓝绿松石，aeroides海蓝宝石，cornelians红玉髓，mellites密蜡，Verdelites绿碧玺，phoebezhennan桢楠，hawkbillturtle玳瑁，saualpite坦桑石，almashite琥珀，chalchiguite硬玉/绿松石chalchuite翡翠，Nanyangjade南阳玉，Dalbergiaodorifera降香黄檀scentedrosewood海黄花梨，小叶紫檀Pterocarpussantalinus檀香紫檀，大红酸枝Dalbergiacochinchinensis交趾黄檀，Dalbergialouvelii大叶紫檀，bitellos大钻石，Barklyite红宝石，berylite绿宝石，canutillos祖母绿，Cymophanite猫眼石，rubyspinel红尖晶石，hecatolite月光石，corundums刚玉宝石，tridacnas砗磲，cabardine麝香，ambraGrisea龙涎香，lignaloo沉香，AquilariaCrassna奇楠沉香，Lignaloes沉香木，西红花StigmaCroci藏红花/番红花，QingtianStone青田石，preciouscorals红珊瑚，uranolite陨石，nephrites和田玉，Jasperite碧玉，muttonfatjade羊脂玉，chungdzi措思天珠，ametrines紫黄晶，phoebesheareri金丝楠，dalbergiaretusa微凹黄檀，花枝dalbergiabariensis巴里黄檀，burmapadauk缅甸花梨，Pterocarpusmacrocarpus大果紫檀，dalbergiaoliveri白酸枝，dalbergiacultrata刀状黑黄檀
“precious corals,” are deeper-water, branching cnidarians that have been used for thousands of years to make beautiful beads, idols, and expensive jewelry. Interestingly enough, this group secretes an endoskeleton that is considerably harder than the exoskeletons of the so-called hard corals.

There are four types of precious coral in Hawai‘i: black coral (Antipathidae), gold coral (Parazoanthidae), red or pink coral (Corallidae) and bamboo coral (Isididae). Each of these has a different internal skeleton. Red and pink corals produce a calcite skeleton similar in hardness to ivory and pearls. Bamboo corals, on the other hand, produce a skeleton composed partially of calcite and partially of protein that is similar to the keratin in your fingernails. These alternating bands of material resemble a bamboo stalk; thus the corals' name.

Black and gold corals secrete only protein and no calcite. In addition, gold coral is a parasite, whereby its larval stages settle out on other species of corals, particularly bamboo corals. Eventually, the gold coral overgrows the entire bamboo “tree,” incorporating the bamboo coral's skeleton as the core of its own skeleton. Gold and bamboo corals also have another interesting characteristic: They are bioluminescent. These corals light up in a beautiful show of sparkling blue lights when mechanically stimulated, such as when the current is strong or when a crab walks down one of their branches. Perhaps it attracts the small animals they feed on; no one really knows for sure.

Harvesting Methods

Precious corals have been harvested in a number of ways. For centuries, fishermen dragged nets over the sea floor, which broke and entangled the coral trees so they could be hauled into a boat. Because this method can impact other marine life attached to the sea floor, dredging and drag netting are now banned in the United States. The nation's precious corals are harvested by permit and only with selective methodologies.

In Hawai‘i, black corals are found in 100-300 ft of water, shallow enough to harvest using scuba equipment. Many harvesters, however, have died in pursuit of coral trees at the deep end of this range. Red, gold and bamboo coral are found between 1,000 and 1,500 ft; harvesting is conducted with remotely operated vehicles (ROVs) or submarines.
珊瑚中最具价值的是红珊瑚PreciousCorals贵珊瑚，贵珊瑚PreciousCorals又被称为红珊瑚。

标签：skeleton,gold,coral,称作,preciouscorals,corals,bamboo,红珊瑚
来源： https://www.cnblogs.com/xueo/p/11924973.html