Veins are mineral deposits which form when a fracture or fissure within a larger body of rock is filled with new crystalline material.
Veins
In gemology this term is loosely used to describe long thin lines that occur on the surface of the gem. The black lines seen in turquoise or howlite are two example of these veins.
Vug
An open cavity in rocks, often lined with crystals.
veins in hydrothermal deposits, and hydrothermal replacements
Association:
quartz, pyrite, sphalerite, magnetite, tourmaline ...
Veins have been worked in the past at Lochwinnoch in Renfrewshire for high grade barite. The Muirshiel Mine was a valuable producer of that mineral in the post-World War II years until extraction ceased in the 1970s.
In veins that cut ultramafic rock (peridotite, dunite)
Mines originally worked by primitive methods; were improved prior to W.W.I. $2 million mined in 4 year period preceding W.W.I. Mines nationalized in 1958.
The veins that are seen in semiprecious gemstones, for example, the black or copper veins that run through turquoise. Synthetic stones in costume jewelry mimic the matrix of genuine stones.
Matte finish ...
These veins are sheared and varies from 10m to 40m in thickness. Aquamarine crystals are of cabochon to facet grade varieties and are quite clear bearing few inclusions. Aquamarine mineralisation occurs within the pegmatites veins.
Green veins are clearly visible in this large block of jadeite at Lot 88 in the Polar Urals jade mines.
Photo: © Richard W. Hughes ...
More recently, veins have been found in Brazil, South Africa, Zambia, Pakistan, Afghanistan and India, but none of these stones can equal the beauty of the Colombian specimens.
Comments:
Forms in veins.
Inaccurate data? Better photos? .
If you like this website and find it useful, please consider making a donation. This site is a single-student effort! ...
Color: dark with lighter veins
Comments: contains: quartz, feldspar; used as building stone. Found in the Black Forest (Germany)
Alabaster ... See Calcite, Gypsum
Albite ... See Plagioclase Feldspars Alexandrite ...
Rhodonite Rhodonite has a distinct pink or rose red color, although material containing black veins is more popular than a uniform pink. Massive rhodonite is usually opaque to translucent and is carved or cut as cabochons or beads.
I have a lot of physical pain (especially not limited to, lower back pain, problems with feet, knees, or varicose veins). Chakra 1
No matter how much time (and/or money) I spend trying to enjoy myself I rarely feel satisfied. Chakra 2 ...
Gem mining is notoriously unpredictable: Valuable veins of precious opal may - or may not - twist unseen through the more common variety of opal found at the new site.
So it's possible no one will express much interest, Hausel said.
Rhodonite is an opaque, deep-rosy-pink-to-lavender gemstone with characteristic black veins called dendrites.
Boulder opal is found sparsely distributed over a wide area of Australian ironstone or boulder country where the opal (silica mix) fills veins, cracks, cavities and crevices in ironstone boulders.
Even thought it is accepted knowledge that the Archduke Ferdinand Maximilian Joseph was of royal blood, there is lingering debate as to who's royal blood he actually carried in his veins.
The rock crystals are produced from quartz veins in sandstones and shales of the central part of the Ouachita Mountains.
Deep caves in Australia were first discovered in 1872, producing thin veins of very fine quality boulder opals. This thin but brilliant colored boulder opal was primarily used for carving cameos.
Danburite is found in metamorphosed limestones and low temperature hydrothermal veins, but few its numerous locales yield either impressive crystals for the mineral collector, or transparent pieces of sufficient size to facet.
Often, the material has veins or blotches running through it, which are brown, light grey or black depending on where it was found. These lively, more or less regular patterns are known as 'turquoise matrix'.
Copper: A common, reddish-brown metallic element, copper is the only metal which occurs abundantly in large masses as opposed to small veins or nuggets that must be mined out of other rocks.
Carolina, in 1858, enclosed in the veins of a green rock,
thought to be serpentine or lepidolite. Some attempts were
then made, for the first time, at mining this stone, but it was
not until 1872 that any systematic work was carried on at these
mines.
Color that burns along the veins, and gives the brightness to the night. If you're looking for the color of life itself, look no further than a Ruby. The 'King of Gems,' Ruby is one of the world's oldest, rarest, and most revered gemstones.
Quartz occurs in hydrothermal veins and pegmatites. Well-formed crystals may reach several meters in length and weigh hundreds of kilograms. These veins may bear precious metals such as gold or silver, and form the quartz ores sought in mining.
It commonly has black veins of manganese oxide, especially in larger specimens. Rhodonite is a manganese silicate and forms in the triclinic crystal system. It occurs in both a crystallised and massive, fine-grained form.
Deposits in mica schists and calcite veins, which develop by hydrothermal processes, differ in some properties and are limited in size.
Turquoise may contain narrow veins of other materials either isolated or as a network. They are usually black, brown, or yellowish-brown in color.
The veins found inside the stone add to its uniqueness. Lapis was used by the ancient Egyptians as pigment, medicine and cosmetics. This gemstone is found in many handmade jewelry pieces, especially for men.
Both are tough and also often have veins or streaks, which are not necessarily considered defects and often enhance the beauty and value of the stone. The value of jade is generally determined by its colour, clarity and transparency.
Most good crystals are found as gauge minerals in mineral veins. Citrine is often found in association with amethyst, but it is much more rare than its purple cousin. Because it resists weathering, it is also found in alluvial sands and gravels.
They are mainly available in the tin mines located in Bolivia where they exist in hydrothermal veins. This type of ore is available in small elements that are derived from igneous rocks.
Ores (aka "lode deposits") that contain native gold have microscopic particles embedded in the rock, which can have veins of quartz or sulfide minerals like pyrite, calaverite, krennerite, petzite, pyrhotite, galena, sylvanite, and stibnite.
Amphibole var. Amianthus (Brucite ?) is found at the Philips Mine in small fibers with asbestos in minute veins in hornblende.
Amphibole var. Asbestos is found in several specimens as small tufts in crevices and minute veins in hornblende.
Boulder opal is found in Australia where precious opal forms in veins and patches within brown ironstone boulders. When the opal is mixed through the ironstone it is called matrix opal. Hardness ranges between 5.5 and 6 on the Mohs scale.
Rhodonite - From the Greek word for pink. A reddish gem with thin veins or patches of grey-black. Found in the former Soviet Union, USA, India and Australia
Ribbed - A ridged, textured effect
Rock crystal - A mineral; see also quartz ...
Named after the Greek word for pink. A reddish-pink color with thin veins or patches of gray to black. Found in the former Soviet Union, the U.S., India, and Australia.
ribbed
A textured effect consisting of ridges.
Lapis Lazuli: A royal blue opaque semiprecious stone with white veins or patches of calcite and a few gold-looking metallic flecks of pyrite. Lapis can be dyed to enhance the color.
A piercer should check the tongue thoroughly before the piercing. There are three arterial veins that run from near the tip of the tongue right back along the length of the tongue.
See more information on the Tongue
Tongue Atoms ...
Derives its pink color from Manganese. Rhodocrosite occurs in veins associated with Manganese, Copper, Silver, and lead deposits.
Ribbed
A textured effect consisting of ridges.
Feldspar is the name given to a group of common rock-forming Minerals. Feldspars occur as compact Minerals, as veins, and are present in many types of metamorphic and sedimentary rock. Moonstone is a Feldspar.
Fire ...
Greek for pink. A reddish gem with thin veins or patches of grey-black.
Rock crystal
A mineral - see quartz.
Turquoise from Iran is often said to be the best and sometimes it has a clear sky blue color, with no green overtone and no black or brown veins running through it.
Turquoise is more expensive when it has an intense blue color without green overtones.
Agate usually occurs as rounded nodules or veins. The layers of quartz are often concentric. The composition of agate varies greatly, but silica is always predominant, usually with alumina and oxide of iron.
A form of Boulder Opal from Yowah (Queensland), Australia. It occurs most often as a nut-sized ironstone nodule containing pockets and veins of vivid Precious Opal.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
A soft yellow corrosion resistant element, the most malleable and ductile metal, occurring in veins and alluvial deposits and recovered by mining or by panning or sluicing.
Gold Tone ...
The metal occurs as nuggets or grains in rocks, underground "veins" and in alluvial deposits. It is one of the coinage metals. Gold is dense, soft, shiny and the most malleable and ductile substance known.
Also known as 'placer gold' it exists as small particles or nuggets of gold, found in easily accessible surface material eroded from larger gold deposits known as veins or lodes.
Approved Refiner ...
Maw Sit Sit is an aggregate of numerous minerals, the six main components are: Chromite, ureyite, chrome-jadeite, symplektite, chrome amphibole, and a matrix of lighter minerals. This material is opaque to translucent with flowing veins of green and ...
It looks similar to Lapis, and is a component of Lapis, occurring in massive dodecahedrons and found in igneous rocks. It has varying degrees of white veins of calcite and an occasional speck of pyrite.
Plastic surgery alternatives. Liquid facials, Botox, Restylane, Juvederm, Radiesse injections, Microdermabrasion, chemical peels, laser hair removal, body wraps, cellulite, varicose veins reduction, no-needle lipo.
been India, the Ural Mountains of Russia, Rhodesia (now Zimbabwe) from 1955 (there called 'Sandawana emeralds' and being usually under one carat, but of good colour and free of inclusion), Zambia (from 1974), and Brazil (the stones having open veins ...
The purest blue specimens are more highly prized as are samples exhibiting veins of pyrite. A soft stone rating 5 to 6 on the Mohs Scale, gems may be adversely affected by hot temperatures or acids.
An attractive mineral, sometimes solid blue or with calcite veins running through it, sodalite is commonly used for jewelry.
Spring Hard
Temper of wire that is extremely resistant to losing it's shape.
 See also: Water, Stone, Jewel, Color, Transparent
|
