From gemstone point of view, tridacna calm shell has a pearl luster and glossy but has a pure white color, only the glossy and delicate textured calm shell can be chosen to make tridacna jewelry. These three shells of Tridacna species are part of the collection at GIA’s Bangkok laboratory. Tridacna synonyms, Tridacna pronunciation, Tridacna translation, English dictionary definition of Tridacna. But they needed to prove it, and that was a challenge. Two Large Pearls. Guide to shells for best shelling It is also critically endangered. Tridacna gigas is the largest mollusk in the world. We took a small blood sample with permission of local authorities. Their numbers have plummeted since the 1970s due to over-harvesting, mainly for food and aquarium displays. The two largest measure approximately 33 × 20 cm each. Its shell and pearls are the whitest natural gemstone on earth. Identify seashells from beaches of Sanibel Island, Captiva, Marco, 10k islands, Goodland, Naples, westFlorida, Gulf coast, Lee County, Collier County. See more. Learn why it the shells lack luster and more. Figure 2. Using a wedge to keep open a Tridacna shell in my Red Sea work. This caused no lasting effects to the clams. Description Tridacna squamosa can be identified by the large, leaf-like fluted scales on its shell, which are often used as shelter by organisms such as small crabs, clams, and other invertebrates.These scales run parallel from the rim to the bottom of the shell. They inhabit shallow waters of coral reefs in warm seas of the Indo-Pacific region. Tridacna Gigas -- Giant Mollusks. Giant clams can be unwilling research participants. It calms one’s mind, enhance wisdom and promote good energy flow. The two larger shells were found empty by Thai divers, while the smaller shell was donated to the Bangkok lab several years ago and comes from an unknown source. Tridacna gigas contain marine algae which are a food source for many of the fish species eaten by humans. Tridacna is an organic gemstone formed from a giant clam as big as 4 feet in length and weighing more than 500 pounds. Scutes, or scale/leaf like shelf growths on the outer side of the shell of Squamosas is the easiest way to identify them. Tridacna definition is - a genus of marine bivalves (family Tridacnidae) having no anterior adductor muscle and an equivalve shell the valves of which are very thick and heavy and strongly plicated at … Reaching about 18 inches maximum, this clam is known to be a bit less demanding than the other species in the lighting and flow department. Tridacna definition, a genus of giant clams inhabiting reefs in the South Pacific, attaining a diameter of 4 feet (1.2 meters) or more, and weighing over 500 pounds (227 kilograms). Mantle is brightly coloured. Tridacna Squamosa has seen increasing popularity within recent years. The tridacna gigas is the largest species of clam on the planet, with a lifespan of almost a hundred years and a weight of hundreds of pounds. They are increasingly vulnerable to poaching, both for their meat and shells, which are used as a replacement for ivory in jewellery and decorations. Tridacna enhances the magnetic field of the human body and creates an aura of protection against negative energies. Tridacna is the most white substance in the world, it is also a rare organic gemstone, Buddhist relics. POWER, MEANINGS AND HEALING PROPERTIES. Tridacna is a genus of large and gigantic saltwater clams, marine bivalve mollusks in the subfamily Tridacninae, the giant clams.They have heavy shells, fluted with 4–6 folds. The following information is from Kunz & Stevenson, pearl experts who were published in 1908. The mantle is normally brown, generally mottled with linear and/or spotted markings of varying colours, such as green, blue, and purple.