rocks containing gold and diamonds

which kind of rocks contain's gold? help!...and what are ...

Jun 13, 2008· Gold nuggets can form in quartz veins in metamorphic rocks during mountain building. Or it can form in sedimentary rocks after erosion and river transport. Gold is often found with silver.

Diamond: The mineral Diamond information and pictures

Formed in plutonic rocks in the form of ... specifically the Kimberly Mine (also known as "The Big Hole"). The surrounding area also contains many productive Diamond mines. Two other famous mines in South Africa are the Premier Mine (Cullinan Mine), in Pretoria; and the Finsch mine in Northern Cape province. ... In California, in the Gold ...

Eight Natural Geologic Signs Pointing Toward Gold ...

Rock Contact Zones and Faults: Many quartz veins and other hard rock gold deposits occur in "zones" along faults or at the contact of two different types of rock. Correct Topography: As a general concept, the coarser gold does tend to hang up farther upstream.

Strange Rock from Russia Contains 30,000 Diamonds

The astonishing amount of diamonds, and the rock's unusual Christmas coloring, will provide important clues to Earth's geologic history as well as the origin of these prized gemstones, Taylor said.

GUIDE TO PROSPECTING AND ROCK HUNTING IN WYOMING

for gold, diamonds, agates, or other precious metals or gemstones, you will find there is a wonderful opportunity to prospect or rock hound in the Cowboy State.

List Minerals Associated with Gold

To know what type of rock is gold associated with you must see that the minerals most common in placer deposits are platinum, iridosmine, magnetite, iron pyrites, ilmenite, zircon, garnets, rutile and barytes; wolfram, scheelite, brookite and diamonds are less common.

Recent Advances in Understanding the Geology of Diamonds ...

Both peridotite and eclogite contain diamonds, but intact peridotites erupted to the surface with their diamonds in place are rare, while eclogites with their diamonds in place are common. (For a detailed description of rock type, see Kirkley et al., 1991.)

Discovering Earth's Hidden Diamonds Just Got Easier

Diamond prospectors know that the secret to finding diamonds is to locate rocks called kimberlites. A new study in Nature this week may help them focus their search a bit more closely, and also ...

Peridotite: Igneous Rock - Pictures, Definition & More

Kimberlite with diamond: Kimberlite, the rock that is found in many diamond pipes, is a variety of peridotite. The specimen above is a piece of kimberlite with numerous visible grains of phlogopite and a six millimeter octahedral diamond crystal of about 1.8 carats.

Gold in lgneous,Sedimentary, And Metamorphic Rocks

Gold in lgneous,Sedimentary, And Metamorphic Rocks . Gold in Igneous, Sedimentary, And Metamorphic Rocks By Robert S. Jones GEOLOGICAL SURVEY CIRCULAR 610 ... Sedimentary rocks contain as little as 0. 3 to as much as 41 ppb gold. The average of 5.0 ppb is based on the average of 7.5 ppb for sandstone, 3. 9 ppb for shale, and 3. 5 ppb for ...

Gold: The mineral native Gold information and pictures

Gold in its natural mineral form almost always has traces of silver, and may also contain traces of copper and iron. A Gold nugget is usually 70 to 95 percent gold, and the remainder mostly silver. The color of pure Gold is bright golden yellow, but the greater the silver content, the whiter its color is.

The GemHunter's Guide to Gold and Diamonds in Montana ...

Aug 12, 2013· The GemHunter's Guide to Gold and Diamonds in Montana ... Diamonds In Montana's Gold Fields Outline of the Wyoming Craton (basement rocks of Archean [>2.5 ... Ma=Millions of years ago) located 67 miles to the southeast. The rocks contain a host of xenoliths including garnet-bearing lherzolites, harzburgites, and dunites. The Williams ...

GOLD RUSH - Blogger

Many chemically formed ore shoots yield good ore deposits. During vein formation, hot silica (quartz-rich), hydrothermal acidic fluids react with rocks with favorable chemistry; particularly rocks with calcium carbonate (limestone, dolomite). Thus, following a vein that cuts through limestone could lead prospectors to find skarns, replacement deposits, etc for gold and other valuable minerals.

Rocks and Gems - Prospecting Texas

The rocks of the area make great crystals and pretty rocks but are dangerous to stay around. Be aware of the rocks you are collecting. South of the Llano uplift down around the Rio Grande below Del Rio is great agate country and also where there is a type of marble that one might be able to see free gold in.

Kimberlite - Wikipedia

Kimberlite is an igneous rock, which sometimes contains diamonds. It is named after the town of Kimberley in South Africa, where the discovery of an 83.5-carat (16.70 g) diamond called the Star of South Africa in 1869 spawned a diamond rush and the digging of the open-pit mine called the Big Hole.

Which countries contain gold deposits? - Quora

Dear sir/ madam. we are local miners and sellers off raw alluvial within Africa and global and representing various mining chiefdom's in Sierra Leone and west Africa, We presently have Gold dust, Gold in bars Form and Rough Uncut Diamonds,which is...

Diamonds in the Rough - Soonet

Jewels beneath the Earth's Crust . Diamond Fever. With the discovery of diamonds in Nunavut, Canada, in the early 1990's, a new area was heralded into mineral exploration and mining history. ... The eclogite is thought to form as the residue from partial melting of a subducting oceanic slab which contains rocks with a wider range of carbon ...

How can we recognize a rock containing gold? - Quora

I have been a professional exploration and mining geologist in the business of gold for close to 40 years. My answer to this question is: You can't reliably recognize a rock containing gold, UNLESS the gold is present in large enough physical pieces to be visible to the naked eye (or to a 10x hand lens).

Identifying Rocks : Identifying Gold Rocks - YouTube

Jun 08, 2009· Gold is a very rare and precious metal that is soft, malleable and heavy, and it is often found with other minerals, such as quartz. Learn about the differences between gold and fool's gold with ...

Gold Prospecting - Prospector's Guide to Finding Gold

that flattened and stretched the pebbles in the rock. Such rock sometimes contain gold, uranium and even diamonds - basically any type of heavy ... and (3) treasure hunters in your area. Rock hounding can make a nice combination with gold prospecting, gem prospecting, diamond hunting and gold panning. Gold nuggets from Douglas Creek, Wyoming ...

Strange rock containing 30,000 diamonds baffles scientists ...

Dec 19, 2014· In fact, what workers at Alrosa's Udachnaya diamond mine had unearthed was a 30mm rock that contained 30,000 diamonds - a conentration 1m times higher than normal.

Diamond: The gemstone, the mineral, the super material.

Diamond is much more than the world's most popular gemstone and hardest natural material. Today man-made diamonds are being used in computers, speakers, cutting tools, bearings, laser windows, wear-resistant parts and much more.

Volcanic Minerals - Oregon State University

Kimberlite is a gas-rich, potassic ultramafic igneous rock that contains the minerals olivine, phlogopite, diopside, serpentine, calcite, and minor amounts of apatite, magnetite, chromite, garnet, diamond, and other upper mantle minerals.

Safe containing HK$1.6 million in gold bars and diamonds ...

A safe carrying HK$1.6 million (US$204,000) worth of gold bars and diamonds has been stolen from an industrial unit in Hong Kong, along with 10 bottles of red wine. The burglary came to light soon ...

Minerals and Gems | National Geographic

Rocks themselves are made of clusters or mixtures of minerals, and minerals and rocks affect landform development and form natural resources such as gold, tin, iron, marble, and granite.

ROCKS - factmonster.com

Some rocks contain only one mineral. For example, marble is made of the white mineral calcite. Most rocks, however, contain CRYSTALS of several different minerals. WHAT ARE THE MOST VALUABLE MINERALS? Some of the most valuable minerals are ores— minerals that contain metals such as gold, iron, and aluminum. ... Diamonds are often mined from ...

Diamond - Wikipedia

All three of the diamond-bearing rocks (kimberlite, lamproite and lamprophyre) lack certain minerals ... Most diamonds contain visible non-diamond inclusions and crystal flaws. The cutter has to decide which flaws are to be removed by the cutting and which could be kept.

Diamond Jewellery | Stunning Designs at Rocks & Co.

When you buy or receive a piece of Gold Jewellery with Diamonds, the treasure will certainly take a special place in your gemstone jewellery collection. At Rocks & Co., we have combined a wonderful array of well-made designs to meet all tastes.