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2. Crystal healing - Wikipedia

   en.wikipedia.org/wiki/Crystal_healing

   The Sumerians purportedly used crystals in their magical formulas 6000 years ago. [8] Ancient Egyptians mined for crystals and used them to make jewelry. Crystals or gemstones were also used in practice, for their metaphysical properties. Specifically, they used crystals as aids for health and protection.

3. Skeptical Of The 'Power' Of Crystal Healing? The ... - AOL

   www.aol.com/skeptical-power-crystal-healing...

   Crystal healing is a spiritual practice that believes in the power of crystals to shift, absorb, direct, detoxify, diffuse, or amplify the energy of your mind, soul, or environment, says Erin ...

4. Crystal - Wikipedia

   en.wikipedia.org/wiki/Crystal

   Moreover, various properties of a crystal, including electrical conductivity, electrical permittivity, and Young's modulus, may be different in different directions in a crystal. For example, graphite crystals consist of a stack of sheets, and although each individual sheet is mechanically very strong, the sheets are rather loosely bound to ...

5. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   For example, diamonds are made of carbon (C) and rubies of aluminium oxide (Al 2 O 3). Many gems are crystals which are classified by their crystal system such as cubic or trigonal or monoclinic. Another term used is habit, the form the gem is usually found in. [12] For example, diamonds, which have a cubic crystal system, are often found as ...

6. List of minerals - Wikipedia

   en.wikipedia.org/wiki/List_of_minerals

   Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species. Within a mineral species there may be variation in physical properties or minor amounts of impurities that are recognized by mineralogists or wider society as a mineral variety.

7. Euhedral and anhedral - Wikipedia

   en.wikipedia.org/wiki/Euhedral_and_anhedral

   Euhedral pyrite crystals A subhedral sample showing sharp to anhedral pyrargyrite crystals. Euhedral and anhedral are terms used to describe opposite properties in the formation of crystals . Euhedral (also known as idiomorphic or automorphic ) crystals are those that are well-formed, with sharp, easily recognised faces .

8. Navaratna - Wikipedia

   en.wikipedia.org/wiki/Navaratna

   Thailand's "Queen Sirikit Navaratna" necklace.. Navaratna (Sanskrit: नवरत्न) is a Sanskrit compound word meaning "nine gems" or "ratnas".Jewellery created in this style has important cultural significance in many southern, and south-eastern Asian cultures as a symbol of wealth, and status, and is claimed to yield talismanic benefits towards health and well-being.

9. Mineral - Wikipedia

   en.wikipedia.org/wiki/Mineral

   The basic level of definition is that of mineral species, each of which is distinguished from the others by unique chemical and physical properties. For example, quartz is defined by its formula, SiO 2, and a specific crystalline structure that distinguishes it from other minerals with the same chemical formula (termed polymorphs). When there ...