where do we can find granite ?
340074
granite is very abundant in continental crusts. There are lots of plutonic rocks in continetal regions not like in oceanic crusts.
124812
well i know there is shist, gneiss, slate and a whole lot more visit this website and it will give you all of the metamorphic rocks that your looking for.
34539
A search on Yahoo! Shopping for "lodestone" will help you source one.\nhttp://shopping.yahoo.com/search?p=lodestone
323011
depend on the type of rock. what material or materials is it made of, is it granite or what?
897783
Also check out the " Four Peaks Amethyst Mine", its in Arizona. It will give you additional information which you are seeking.
122456
Both of the other anwers are right, but I thought you might also like to know why the granite is harder and can scratch the marble.\n\nThe granite is made of crystals of the minerals quartz (harndness 7), feldspar (hardness about 6) and relatively small amounts of mica (hardness 2 to 3).  This is what geologists call granite; there are a lot of other stones that stonecutters call granite, but almost all of them are made of minerals that are nearly as hard as or even harder than the stuff in geologists' granite.  A higher hardness number means a harder material.  Talc, at 1, is very soft and diamond, at 10, is very hard.\n\nMarble is made of all or mostly calcite, which has a hardness of 3.\n\nSo when you rub the granite and marble together, most of the contact is between harder mineral grains in the granite and softer mineral grains in the marble, and the granite scratches the marble.
265420
Here, try this:\n\nhttp://www.rocks-and-minerals.com/\n\nCheers.
616212
Check USGS (US Geological Service).
330352
LET IT START FROM YOU. \nSEE THE BEAUTY, YOU WILL FIND A LOT.
296288
Answering the question would be easier if I knew which type of mineral you were looking for.  Try looking on this link:\n\nhttp://www.rockhounds.com/rockshop/table.shtml\n\nIf you are looking to purchase, there are many people willing to take your money.  For information and more reasonable prices, there are rockshops (non new age) sprinkled through out the country, and the 2 best gems shows are in Denver & Tuscon.\n\nThe next issue is size.  In different mineral species, different sizes are considered large.  For example, quartz crystals up to the size of a gallon jug are found in Mt Ida, AK while selenites have been found in Mexico up to 20 ft tall (note that these are single crystals, not undifferentiated masses).  The largest rhodocrosite is about 6.5 inches per face (in the Denver Natural History Museum), the largest calcite is around 2 foot long (Shifferdecker Museum in Joplin, Mo).  With my friends, I have found a 14" double terminated calcite in Okhlahoma, and a nearly 2 foot selenite in Kansas.\n\nSolution minerals are more typically accessable when compared  with igneous ones, but all the hugest crystals are of igneous origin.  Most of the world record holders are so big thay can never be moved from the mine, unless destroyed.\nIf you seek mineral materiel without reference to single crystals, rough is available in masses shipped in either oil barrels or box cars, usually for industry or amature lapidary work.\n\nIf you are seeking gem materiel, it is unlikely that you can find it for a price within reason, even the synthetics. \n\nIf you are seeking geodes, the warsaw shale is the place to look.  It extends through out the midwest.\n\nThere are groups of rockhounds all over, and we go forth to find exactly what you are seeking.  However, there is actual physical labor involved, and possibly travel costs.  You might consider also speaking a professor with the local college in your area.
18367
You might want to provide some details.  Please tell us what kind of difficult-to-find things you're looking for.  (If you really meant "unfindable," then nothing could find it, so there would be no point to your question!)
451881
try the geosites, it's better,
639552
looking for something we crave or are missing
386126
Try Marble Mountain, Newfoundland, Canada. BEAUTIFUL Area.
621420
look here http://www.rocksandminerals.adventuresinodyssey.be/
161023
Not likely. The reason is that most of the drainage of the American River is coming from metamorphic terranes. \n\nI don't have a very good geologic map of that area, but you are only likely to find geodes where they have weathered out of extrusive igneous rocks, like basalt flows, or in rhyolite beds (volcanic ash). If you can find an area that has volcanic rocks, other than the granitic plutons that are common in the Sierras, you might find some. I think you are more likely to find placer gold in that area than geodes. \n\nYou are fairly close to Sacramento and the California State Geological Survey sells a printed map of the states surficial geology. You can buy a paper geology map for any part of California from them at:\nhttp://home.att.net/~amcimages/mozley.html\nhttp://www.consrv.ca.gov/CGS/information/publications/pub_index/products_that_we_sell.htm\n\nI think to find geodes you are going to have to go over the hill to the east side of the Sierras, or head north towards Shasta. \n\nGood luck.\n\nHere's an interesting link to a Washington geode collector:\nhttp://www.washington-state-rockhounding.info/red-top-cliffs-collecting.htm\nHere's a locale near Blythe:\nhttp://www.desertusa.com/magjan98/stories/hauserbeds.html
714759
counter tops, try home depot or Lowe's, as far in town I can't think of anywhere, its mostly sandstone and bedrock,but if you travel up a ways here is some info I found were you can find it in the rough:\nSubsection M262Bf\nSanta Ana Mountains\nThis subsection includes the Puente and Chino Hills, which are northwest of the Santa Ana River, and most of the Santa Ana Mountains, which are southeast of the Santa Ana River.  The climate is hot and subhumid; it is modified moderately by marine influence.  MLRA 20d. \nLithology and Stratigraphy.  This subsection contains mostly Jurassic marine clastic sedimentary, Jurassic volcanic, and Mesozoic granitic rocks.  There is some mafic plutonic rock and small areas of Pleistocene basalt.  The Puente and Chino Hills consist of Miocene marine sedimentary rocks.