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2. Epidote - Wikipedia

   en.wikipedia.org/wiki/Epidote

   Epidote is an abundant rock-forming mineral, but one of secondary origin. It occurs in marble and schistose rocks of metamorphic origin. It is also a product of hydrothermal alteration of various minerals (feldspars, micas, pyroxenes, amphiboles, garnets, and others) composing igneous rocks. A rock composed of quartz and epidote is known as ...

3. Chalcedony - Wikipedia

   en.wikipedia.org/wiki/Chalcedony

   Chalcedony. Chalcedony (/ kælˈsɛdəni / kal-SED-ə-nee, or / ˈkælsəˌdoʊni / KAL-sə-doh-nee) [2] is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. [3] These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic.

4. Marble - Wikipedia

   en.wikipedia.org/wiki/Marble

   Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO 3) or dolomite (CaMg (CO 3) 2) that have recrystallized under the influence of heat and pressure. [1] It has a crystalline texture, and is typically not foliated (layered), although there are exceptions. In geology, the term marble refers to metamorphosed ...

5. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...

6. Charles Allan Gilbert - Wikipedia

   en.wikipedia.org/wiki/Charles_Allan_Gilbert

   Charles Allan Gilbert. Charles Allan Gilbert (September 3, 1873 – April 20, 1929), better known as C. Allan Gilbert, was an American illustrator. He is especially remembered for a widely published drawing (a memento mori or vanitas) titled All Is Vanity. The drawing employs a double image (or visual pun) in which the scene of a woman admiring ...

7. Vanity (Titian) - Wikipedia

   en.wikipedia.org/wiki/Vanity_(Titian)

   Vanity is an oil painting by the Italian late Renaissance painter Titian, dated to around 1515 and now held at the Alte Pinakothek in Munich, Germany. History [ edit ] The work was perhaps in Emperor Rudolf II 's gallery in Prague , before becoming part of that of the Electors of Bavaria .