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2. Heliotrope (mineral) - Wikipedia

   en.wikipedia.org/wiki/Heliotrope_(mineral)

   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).

3. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

4. Felsite - Wikipedia

   en.wikipedia.org/wiki/Felsite

   Color is generally white through light gray, or red to tan and may include any color except dark gray, green or black (the colors of trap rock). [1] The mass of the rock consists of a fine-grained matrix of felsic materials, particularly quartz , plagioclase and potassium feldspar , [ 2 ] and may be termed a quartz felsite or quartz porphyry if ...

5. Crystal healing - Wikipedia

   en.wikipedia.org/wiki/Crystal_healing

   Crystal healing is a pseudoscientific alternative-medicine practice that uses semiprecious stones and crystals such as quartz, agate, amethyst or opal. Despite the common use of the term "crystal", many popular stones used in crystal healing, such as obsidian, are not technically crystals. Adherents of the practice claim that these have healing ...

6. Aqeeq - Wikipedia

   en.wikipedia.org/wiki/Aqeeq

   A geode of chalcedony richly colored by hematite that gives it its rusty hues and marks it as Akik [contradictory]. Aqeeq, akik or aqiq (Arabic: العقيق) means quartz in Arabic, and agate in Turkish, however in the context of rings usually refers to a ring set with a chalcedony stone.

7. Dzi bead - Wikipedia

   en.wikipedia.org/wiki/Dzi_bead

   Chung dzi are believed to have similar properties to real "eyed" dzi; they are less valuable, but they are highly prized by Tibetans and also considered a variety of dzi. Another similar type of bead is called Luk Mik ("goat's eye") – it is a naturally formed "one-eyed" coin-shaped [ 3 ] agate (pictured).

8. Porphyry (geology) - Wikipedia

   en.wikipedia.org/wiki/Porphyry_(geology)

   "Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.

9. Spatika Lingam - Wikipedia

   en.wikipedia.org/wiki/Spatika_Lingam

   High quality quartz crystals are single-crystal silica with optical or electronic properties that make them suitable for hardstone carvings. The Hindu temples in South India use this semi-precious mineral for making Shiva Lingams. Sphatikam beads are made from translucent rose quartz are cut and polished as beads.