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Vitamin may have a protective effect on bone mineral density and reduced risk of hip, vertebral and non-vertebral fractures. [11] These effects appear to be accentuated when combined with vitamin D and in the setting of osteoporosis. [1] Research suggests that vitamin K 2 (Menaquinone 7, MK-7]) may reduce the rate and severity of night time leg ...
Azurite crystallizes in the monoclinic system. [10] Large crystals are dark blue, often prismatic. [3] [4] [8] Azurite specimens can be massive to nodular or can occur as drusy crystals lining a cavity. [11] Azurite has a Mohs hardness of 3.5 to 4. The specific gravity of azurite is 3.7 to 3.9. Characteristic of a carbonate, specimens ...
In addition, these meanings are alluded to in older pictures, songs and writings. New symbols have also arisen: one of the most known in the United Kingdom is the red poppy as a symbol of remembrance of the fallen in war.
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Azurite was frequently used in European Renaissance painting. It appears, for example, in the dark blue sky of a Spanish altarpiece painting by Bartolome Bermejo. [8] In this painting, azurite is also combined with lead white to paint the green robe of the Saint. [8] During this time, azurite was a common pigment used to paint a blue sky. [1]
Associated minerals are quartz, limonite, azurite, malachite, cuprite, and other secondary copper minerals. It is typically found as botryoidal or rounded masses and crusts, or vein fillings. A 2006 study has produced evidence that chrysocolla may be a microscopic mixture of the copper hydroxide mineral spertiniite , amorphous silica and water.
It is known throughout the world for its exterior frescoes of bright and intense colours, and for the hundreds of well-preserved figures placed against the renowned azurite background. The small windows, their rectangular frames of crossed rods and the receding pointed or shouldered arches of the interior doorframes are Gothic .
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