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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.
The lower parts of the walls of the 16th century dining hall of St John's College, Cambridge are covered with wood panelling in a linenfold design. An English oak chest with complex linenfold panels. Linenfold (or linen fold ) is a simple style of relief carving used to decorate wood panelling with a design "imitating window tracery", [ 1 ...
Short planks of wood were used in Ancient Egypt. They needed to be left to dry before being used to avoid problems that might arise from the contraction of the wood. Ash wood was a wood was used to make furniture which was supposed to last an eternity. Ash wood was utilized due to the fact that it was perishable. Making it last a long time.
The conservation and restoration of wooden artifacts refers to the preservation of art and artifacts made of wood. Conservation and restoration in regards to cultural heritage is completed by a conservator-restorer. Carved wooden figure; Woman with child Wellcome L0036701. See also Conservation and restoration of wooden furniture
Domestic windows were generally small and were made of broad glass or cylinder glass before crown glass was first made in England in 1678. Broad glass is usually around 1.5 to 2 mm thick and uneven, often with scars and marks on the surface where it has been 'ironed' flat, and often has a greenish tint. Later windows often had crown glass ...
Pigmented structural glass [a] was developed in 1900 in the United States by the Marrietta Manufacturing Company of Indianapolis, Indiana. [2] [3] [4] The product was made by combining borax, [5] cryolite, kaolinite, manganese, silica, [4] feldspar, [6] [5] and fluorspar. [6] [5] [b] The fluorides made the glass opaque. [1]
From ancient history to the modern day, the clitoris has been discredited, dismissed and deleted -- and women's pleasure has often been left out of the conversation entirely. Now, an underground art movement led by artist Sophia Wallace is emerging across the globe to challenge the lies, question the myths and rewrite the rules around sex and the female body.
Folding screens were originally made from wooden panels and painted on lacquered surfaces, eventually folding screens made from paper or silk became popular too. [3] Even though folding screens were known to have been used since antiquity , it became rapidly popular during the Tang dynasty (618–907). [ 7 ]