RockHoundBlog

Interesting rockhounding find – Heart shaped rocks sent in by reader

Filed under: Great Finds-specimens,regular postings — Gary February 25, 2007 @ 12:08 pm

Thought I would share this neat rock I found recently.  Enjoy!!!  🙂

heart_shaped_rockheart_shaped_rock_2

Melissa and My Furry Friends, Reba, Tiger, Lucas and Jagger as well as Cally, Mick and Bufford

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Michigan Gem & Mineral Society Proudly presents Their 45th Annual Show

Filed under: Coming Events,regular postings — Gary February 24, 2007 @ 11:34 pm

Michigan Gem & Mineral Society Proudly presents Their 45th Annual Show
“Gem Heaven In 07”
Michigan Center Masonic Lodge
355 Napoleon RD.
Michigan Center, MI
March 16th 11am to 6pm
March 17th 10am to 6pm
March 18th 10am to 5pm
Rocks, Minerals, Fossils, Beads, Silent Auction, Demonstrations, Exhibits,
Lapidary Tools,
Jewelry, Bench Jeweler, Much more…

Gene Przybranowski
eprzyb@tc3net. com

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Albuqueruque Gem and Mineral Club-annual gem and mineral expo

Filed under: Coming Events,regular postings — Gary @ 11:20 pm

Sponsored by the Albuqueruque Gem and Mineral Club. This annual gem
and mineral expo will be held on March 16, 17, and 18 at the New
Mexico State Fairgrounds (NM Expo) in Albuquerque. It will be
held in the School Arts & Flower Building. Admission is $1 on Friday
and $3 on Saturday and Sunday, kids under 13 get in free. Over 30
dealers specializing in jewelry, gems, minerals, one-of-a-kind rock
art, door prizes, mineral identification booth, silent auctions, and
much more.

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chemical vapor deposition (CVD) diamonds- Growing diamonds (colorless and pure)

Filed under: how to?,regular postings — Gary @ 10:44 pm

CVD_diamond One of Apollo’s made diamonds.

“When I came in Monday, I couldn’t see the (stone) in the beaker,” Linares says. The diamond was colorless and pure. “That’s when I realized we could do gemstones.”

Apollo Diamond is making real diamonds through a process called chemical vapor deposition (CVD). Here is an explanation of the process:

(1) A slice of diamond is placed flat inside a chamber. Hydrogen and hydrocarbon gases are injected and heated to thousands of degrees at the right pressure.
(2) Carbon atoms land on the diamond slice and replicate the crystal’s structure, the way a drop of water merges seamlessly into a pool of water. The diamond grows thicker and taller. Growing a 5 carat diamond can take a week.
(3) The top can be sliced off and cut into gems. Or the diamond can be cut into thin wafers for computer chips or other uses. Part of the slice is returned to the chamber to make the next diamond.

“We basically grow our own raw material,” says Apollo president Bryant Linares.

Source: Apollo Diamond

Two different paths to diamonds

In 1955, General Electric figured out how to use room-size machines to put carbon under extremely high pressure and make diamond dust and chips. The diamond material wasn’t pure or big enough for gems or digital technology. But it had industrial uses, such as diamond-tipped saws. Such saws made it possible, for instance, to cut granite into countertops.

(more…)

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Colombia emeralds – Deposits and Mining Production- maps

Filed under: regular postings,rockhounding maps — Gary February 23, 2007 @ 5:29 am

colombia_emerald_map Gachala_EmeraldThe Gachala Emerald is one of the largest gem emeralds in the world at 858 carats. This stone was found in 1967 at La Vega de San Juan mine in Gachalá, Colombia.

Gemstones are found in many parts of the world, singly or grouped together. Groups that are quite large are called deposits. Places with a single find are called the location of discovery, place of discovery, or point of discovery. The word occurrence refers to any four of these terms.

For the past 50 years Colombia has been the leader in the largest emerald production in the world. Colombia’s mining towns supply about 60% of the world’s output and 80% of the highest quality emerald available on the market today.

Muzo_floater_emerald

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Emerald- gem of the day

Filed under: Mineral of the day,regular postings — Gary @ 5:15 am

Emerald_matrix Trapiche-EmeraldTrapiche-Emerald

Emerald (Be3Al2(SiO3)6) is a variety of the mineral beryl, colored green by trace amounts of chromium and sometimes iron. It is highly prized as a gemstone and by weight is the most valuable gemstone in the world, although it is often made less so by inclusions, which all emeralds have to some degree. Beryl has a hardness of 7.5 on the 10 point Mohs scale of hardness. However, this Mohs rating can decrease, depending on the number and severity of inclusions in a particular stone.

Most emeralds are oiled as part of the post lapidary process. The amount of oil entering an emerald microfissure is roughly equivalent to the size of a period in print.

Emeralds come in many shades of green and bluish green. There is a wide spectrum of clarity, along with various numbers of inclusions. Most emeralds are highly included, so it is quite rare to find an emerald with only minor inclusions. Because of the usual inclusions, the toughness (resistance to breakage) is classified as generally poor.

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Ventura Gem & Mineral Society- RockShow

Filed under: Coming Events,regular postings — Gary @ 5:00 am

The Ventura Gem & Mineral Society is once again having it’s “Artistry
Of Nature” rock show, March 3rd and 4th, at the Ventura County
Fairgrounds. 24 dealers, 50 exhibits, fluorescent mineral display, Dino
Petting Zoo, Rockhound Quiz, and so much more!
Saturday March 3 10:00 am to 5:00 pm
Sunday March 4 10:00 am to 4:00 pm
The Fairgrounds charges $5 for parking, but admission to the Show is
free!
For a dealer list and more information check out
www.vgms.org/ show

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Delaware Mineralogical Society-44th Annual Earth Science Gem and Mineral Show

Filed under: Coming Events,regular postings — Gary February 22, 2007 @ 9:10 am

Saturday March 3, 2007 and Sunday March 4, 2007.

The Delaware Mineralogical Society, Inc. will hold its 44th Annual Earth Science Gem and Mineral Show @ Delaware Technical and Community College @ I-95 Exit 4B, Churchmans Road (Rt 58) Newark (Stanton), DE 19713. Hours Saturday are 10:00 a.m. to 6:00 p.m. and Sunday 11:00 a.m. till 5:00 p.m. The show features educational exhibits of mineral, lapidary and fossil specimens, displays from regional and university museums, an expanded roster of fine dealers of minerals, fossils, gems, jewelry and lapidary supplies, door prizes, demonstrations of gem cutting and polishing and a children’s table, where youngsters may purchase inexpensive mineral and fossil specimens. Admission is $5.00, $4.00 for seniors, $3.00 for youngsters between 12 and 16, and free for children under 12 accompanied by an adult. The Delaware Mineralogical Society is a non-profit organization, affiliated with the Eastern Federation of Mineral Societies, and dedicated to learning and teaching about the earth sciences, rocks, minerals, fossils and the lapidary arts. Membership is open to all who are interested in these areas. Info and Coupons at www.delminsociety. net or contact gene@fossilnut. com.

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Conejo Valley Gem & Mineral Club field trip- ant hill- shark teeth fossils

Filed under: Coming Events,regular postings — Gary February 21, 2007 @ 1:08 am

ant_hill_shark_teethant_hill_teeth

Hi, I’m Robert Sankovich. I’m the 2nd VP
Field Trip Coordinator for the Conejo Valley Gem & Mineral Club, in
Ventura County. Here is the information on some of our upcoming field
trips. E-mail me if you need a map. Please let me know if you plan to
attend, or have questions. Looking forward to seeing you on our field
trips.

February Field Trip:
Ant Hill-Feb 24th Saturday 10am-3pm
General information: near Bakersfield California. Come out for a fun
day of digging for shark teeth fossils, the weather should be nice,
cool. The dig site is a walk of 400 yards over semi flat ground, then
up a hill 100 yards. Once there most of the time you’ll be digging in
small area. This is a different site then the Nov 2006 field trip. The
clay is softer and the teeth are harder so you have a better chance of
them not breaking when you remove them from the matrix.

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SanJoaquin Lapidary Society-BAKERSFIELD CALIFORNIA’S 5 th ANNUAL ROCK AND GEM SHOW & TAIL GATE

Filed under: Coming Events,regular postings — Gary @ 12:59 am

Fri/Sat/Sun March 23rd -MAR 25th 2007
TIME:
Fri March 23rd FAMILY NIGHT 9 A.M to 8P.M.
SAT/SUN 9A.M.to 5 P.M.

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