Gemstone usually found in. For example, diamonds, which have a cubic crystal system, are often found as octahedrons. Gemstones are classified into different "groups", "species", and "varieties". For example, ruby is the red variety of the species corundum, while any other color of corundum is considered sapphire. Other examples are the emerald (green), aquamarine (blue), red beryl (red), goshenite (colorless), heliodor (yellow) and morganite (pink), which are all varieties of the mineral species beryl. Gems are characterized in terms of refractive index, dispersion, specific gravity, hardness, cleavage, fracture and luster. They may exhibit pleochroism or double refraction. They may have luminescence
Misamis Occidental Aquamarine Park Misamis Occidental Aquamarine Park Misamis Occidental Aquamarine Park is a tropical resort and a prominent habitat for various marine mammals in Mindanao, Philippines. Located in the boundaries of municipalities of Tudela, Misamis Occidental and Sinacaban, Misamis Occidental. Currently, it features a wildlife park that houses a wide array of animals, most are native to the Philippines. It also features hotel accommodations of hut-style suite cottages that line the mangroves. There is a restaurant located within the park itself. Currently, the Dolphin Island is undergoing rehabilitation and temporarily closed to visitors until further notice. The aquamarine park is readily accessible by