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The Opificio delle pietre dure, literally meaning "Workshop of semi-precious stones", is a public institute of the Italian Ministry for Cultural Heritage based in Florence. It is a global leader in the field of art restoration and provides teaching as one of two Italian state conservation schools (the other being the Istituto Superiore per la ...
A rough specimen of bloodstone. Heliotropes (from Ancient Greek ἥλιος (hḗlios) 'sun' and τρέπειν (trépein) 'to turn') (also called ematille, Indian bloodstones, or simply bloodstones) are aggregate minerals, and cryptocrystalline mixture of quartz that occurs mostly as jasper or sometimes as chalcedony (translucent).
Apa (Hungarian: Apa, Hungarian pronunciation: ) is a commune of 2,575 inhabitants situated in Satu Mare County, Romania. It is composed of three villages : Apa ...
Sa Caleta is a cove on the south west seaboard of the Spanish island of Ibiza. [1] The cove is in the municipality of Sant Josep de sa Talaia and is 6.8 miles (10.9 km) west of the town of Ibiza town. The village of Sant Josep de sa Talaia is 5.7 miles (9.2 km) east of the cove.61562871399953
Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals with chemical formula K(Li,Al) 3 (Al,Si,Rb) 4 O 10 (F,OH) 2. [2] [3] It is the most abundant lithium-bearing mineral [4] and is a secondary source of this metal. It is the major source of the alkali metal rubidium.
The Dropa [1] stones are purported pseudoarcheological artifacts. They are claimed to be a series of 12,000-year old granite discs with inscribed markings that represent an account of an extraterrestrial crash landing on Earth.
Pietra serena was very popular in Italian Renaissance architecture, and because of this the quarries where the stone was found were exploited.Numerous quarries surrounding the Florentine region of Italy have been found both under and above ground, and each quarry was distinct in the variety of pietra serena formed there due to the differing style of rock formation.
Pietrasanta is a town and comune on the coast of northern Tuscany in Italy, in the province of Lucca.Pietrasanta is part of Versilia, on the last foothills of the Apuan Alps, about 32 kilometres (20 mi) north of Pisa.