Rock Crystal Quartz
I really had no thought of writing an essay about what I considered the least interesting of the crystalline quartz varieties: rock crystal.
Rock (geology)
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The Rock, Mineral, & Fossil Reference
Over 150 free images!
Nonsilicate Minerals
Silicate Minerals ...
Rock crystal
Gemology
Myths
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For the manufacture of spheres, the pieces of rock crystal used should be flawless, but some people do prefer pieces with inclusions for their «natural» look.
Rock Crystal
Rock Crystal is the clear colourless (white) form of the mineral quartz. As such it is related to amethyst which is the purple form of quartz, and also to citrine which is the yellow variety.
How Rock Tumblers Work
Choosing The Right Rock Tumbler for You
Rock Tumbler Instructions ...
Fold rock is created when differential force is applied to a material, causing it to change its form [3]. Lower quantities of pressure will cause a material to 'fail' by fracturing, while higher stress levels will cause it to flow (ductile behavior).
igneous rock A rock made from molten (melted) or partly molten material that has cooled and solidified. impurity An item present in a mineral which is not part of its integral structure, and may change its optical properties, such as color.
Chinese Writing Rock Jewelry and Cabochons:
Designer jewelry made with Chinese writing stone. A selection of free form cabochons and rough available for custom designed jewelry.
(click to enlarge) ...
Rock Crystal, Rose Quartz, and Smokey Quartz are sometimes cut as cabochons or hearts, and may also be tumbled for use in bracelets, necklaces, and costume jewellery. Rock Crystal is also commonly cut into large spheres and carvings.
Rock crystal
The transparent, colourless variety of quartz is still known as rock crystal. Long ago, people believed that rock crystal was a compact form of ice: in fact 'crystallos' means 'ice'.
rock (n) an aggregate of minerals. Unlike mineral gemstones, rock gemstones do not have a regular atomic - crystalline - structure. For example, lapis lazuli.
rosaline (n) another name for thulite.
Rock crystal - A mineral; see also quartz
Rope chain - Chain with a spiral appearance; like two thick strands woven together
Rose gold - An alloy of gold and copper, usually a pinkish shade ...
Rock Crystal Quartz (-036)
aka Clear Quartz, Rock Crystal, Baffa Diamond, Bohemian Diamond, Brighton Diamond, Bristol Diamond, Buxton Diamond, Cornish Diamond, Dauphin Diamond, German Diamond, Horatio Diamond, Hot Springs Diamond, ...
Rock, Gem, and Mineral Collecting Sites in Western North Carolina: ...
Rock Crystal: see "Quartz".
Rose Cut: A style of stone cutting that produces a gem with a flat, unfaceted base and a somewhat dome-shaped top that is covered with a varied number of triangular facets and terminates in a point..
Rock Crystal: see Quartz.
Rolo link chain: A chain composed of individually linked round or oval rings resembling a standard cable chain, but with thicker rings.
Rock-Site - Minerals from Great Britain
Acquiring British mineral specimens? Good selection available. Classic and recent sites in England and Scotland: Isle of Skye, Strontian, Weardale & Alston Moor. Good locality info.
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Rock Crystal
Rock crystal is the transparent and purest form of quartz and resembles solid glass.
Rutilate Quartz ...
ROCK CRYSTAL
Rock crystal is a transparent, crystalline mineral. Rock crystal is the purest form of quartz and a semi-precious stone.
ROLLED GOLD ...
rock
Any naturally occurring combination of one or more minerals.
tarnish ...
Rock Crystal, Sapphire, Amethyst, Bloodstone
Aquamarine
Amethyst ...
Rock crystal
One of the most common minerals of the earth's crust. The crystals are usually found as colorless hexagonal prisms with pyramidal ends.
Rose quartz ...
Rock Crystal
The most versatile stone. It is healing, opens one up to sending and receiving guidance.
Rose Quartz ...
Rock Stars’ “Rock' Star
AGTA Receives Good Press from SF Magazine, Rogerson ...
rock crystal
A transparent or translucent semiprecious gemstone. Rock crystal is the purest form of the crystalline mineral, quartz.
OLD ROCK TURQUOISE
Old rock turquoise is an old Persian (Iranian) turquoise term for very high quality turquoise (sky blue, veinless turquoise that retains it color).
OLIVE ...
Host rock mining
Also known as primary deposits, host rock mining is the chipping of gems from the rock in which they formed or are hosted.
Ruby Rock (unlike anything you have every seen)
SnowFlake Obsidian (can it snow in a volcano?)
Sulfur (gunpowder ingredient) ...
TRAP ROCK
Trap rock is a type of igneous rock. This solidified lava often contains pockets of crystals.
TRAPICHE EMERALD ...
Bob's Rock Shop - You will find it all here. First rockhound e-zine on the web. Extensive classifieds section. Bob Keller.
Mineralogical Record - provides cover pictures and table of contents of all editions.
Igneous Rock
Rock formed by the solidification of magma from a volcano.
Iridescence
The play of color in a gemstone resulting from inclusions or layers of minerals.
Quartz (Rock crystal) Colorless and transparent, rock crystal is the most widely distributed variety of quartz, one of the most common minerals of the Earths crust.
Rock crystal quartz, the most common gem variety of quartz crystal, is, like all quartz, formed from the two most abundant elements in the earth's crust: silicon and oxygen.
Rock-forming and rock-destroying processes have been active for billions of years. Today, in the Guadalupe Mountains of western Texas, one can stand on limestone, a sedimentary rock, that was a coral reef in a tropical sea about 250 million years ago.
Rock Solid Facts
Mohs Hardness: 6 to 7
Cleavage: 1 perfect
Enhancements
The vast majority of tanzanite comes out of the ground a yellow-brown color with slight hints of violet.
Rock
Besides a form of music, it's a naturally occuring mixture of minerals or mineral-like substances. A well-known rock is granite.
Rose Quartz ...
Rock Water is actually the only Bach Flower Remedy not made from a flower.
Rock Crystal - colorless; low R.I., low dispersion, and lack of color make this a rather "common" appearing faceted gem.
Rock crystal was once believed to be able to foretell the future. When squeezed this stone becomes electrically charged.
Rock composed of sharp-angled fragments embedded in a fine-grained matrix. Some Jaspers and Agates are brecciated (pronounced: bretch-e-ated).
Briolette ...
Rock crystal which is faceted into beads, originally from the Rhine River
Rivière
Choker type necklace that is a continuous line of gemstones usually of graduated or equal size stones ...
Rock...Stoney matter. Any mass of mineral matter forming an essential part of the earth's crust.
Sclerometer...Device for the quantitative measuring of hardness.
Rock crystal s - colourless
Amethyst - Purple
Citrine - Yellow to amber
Morion - Black
Smoky quartz - smokey grey to brown
Rose quartz - translucent pink
Green quartz - green
Chalcedony and Jasper - Variable
Agate ...
a rock forming mineral, contact metamorphics, hydrothermal, mesothermal, and epithermal veins
Association:
feldspars, pyrite, tourmaline, rutile ...
A rock containing enough iron to permit commercial extraction; an iron ore.
Irradiation ...
1. Rock, Gem, Meteorite and Fossil Links (1)
2. Business Resources (2)
Sites providing services and products for business ...
The Rock-Forming Minerals
The Metallic Minerals
The Mineral Picture Gallery
Related Articles ...
The rock adjacent to, enclosing, or including a vein, layer, or dissemination of ore minerals.
( Return to Overview ) ( SMC Home Page ) ...
Hoffs Rock Shop - Rocks, minerals, fossils, crystals, artifacts, jewelry, crafts, books, CDs. A family business since 1952.
Bob's Rock Shop - This web site is the first on the Internet dedicated to gem and mineral enthusiasts. Host Bob Keller is not selling anything like the name implies, he is merely providing access to all the mineral related information he has amassed.
Cave in Rock
Witherite - 4.6cm x 5.0cm
Benstonite - Minerva #1 Mine, Former collection of Dan Erhling, 4.0cm x 5.0cm
Fluorite - Former collection of Frank Knechtel, 5.8cm x 4.3cm ...
Igneous rock - Rocks formed from magma that has cooled and solidified either at the Earth's surface (eg basalt) or deep below the Earth's surface (eg granite).
Clastic rock... Sedimentary rock made up of fragments of preexisting rocks and transported into the place of deposition.
Cleavage...The tendency of stones to split along one or more definite directions, always parallel to a possible crystal face.
A hollow rock cavity usually containing some form of one or more gemstones. Amethyst and Peridot are examples of gemstones found in geodes.
Girdle
The widest point in circumference of a gem.
Magma: Rock that forms below the surface of the Earth as a result of volcanic activity.
Mineral: An inorganic element of the Earth of consistent atomic structure and chemical composition.
Geode
A rock which contains a cavity lined with quartz or other gemstone crystals.
Girasol
A gemstone with a glowing, milky sheen that moves as the stone is moved in the path of a light source. Opalescence.
Matrix is a rock in which gemstones are found. It is also referred as the host rock or parent rock.
Melee ...
A geode is a rock whose crystal-filled interior can be hollow or filled. The crystals that form within the mineral crust of the geode is called druze. From the outside, geodes look like rounded, but otherwise ordinary rocks.
GERMAN SILVER ...
Brazilian rock quartz
A variety of quartz found in Brazil, used for gemstones . See Quartz.
More terms will be added as time goes by. I welcome questions, comments or even corrections by email.
 See also: Stone, Crystal, Mineral, Color, Gemstone
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