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Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster.
Leaders of states in the U.S. which have significant mineral deposits often create a state mineral, rock, stone or gemstone to promote interest in their natural resources, history, tourism, etc.
Main sapphire-producing countries. Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide (α-Al 2 O 3) with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon.
Las Piedras has many natural attractions such as Cueva del Indio which contains original Taino caves and paintings that denote some characteristics of the island's natives. Las Piedras is located about 45 minutes from San Juan , Puerto Rico's capital and 5 minutes from Palmas del Mar , Humacao which is one of the biggest resorts in the Caribbean.
Piedras Negras was an independent city-state for most of the Early and Late Classic periods, although it may have been allied with other adjacent states and may have paid-tribute to others, at times. It had an alliance with Yaxchilan , in what is now Chiapas state, Mexico, some 40 km up the Usumacinta River.
University of Puerto Rico, Río Piedras Campus with its clock tower, the Roosevelt Tower. Río Piedras (Spanish pronunciation: [ˈrio ˈpjeðɾas]) (Spanish for ''stones river'') is an urbanized commercial and residential district in San Juan, the capital municipality of Puerto Rico, concentrated in the barrios of Pueblo, Universidad, Hato Rey Sur, El Cinco, Monacillo Urbano.
The word jewellery itself is derived from the word jewel, which was anglicised from the Old French "jouel", [2] and beyond that, to the Latin word "jocale", meaning plaything.. In British English, Indian English, New Zealand English, Hiberno-English, Australian English, and South African English it is spelled jewelle
The Cerros de Mavicuri are three hills, located in eastern Colombia, 50 km (31 mi) south of the city of Inírida on the Inírida River.Geologically, the mountains are part of the Guiana Shield.