What Is A Mining Claim
Types of Claims
PATENTED MINING CLAIM: A patented mining claim is one for which the Federal Government has passed its title to the claimant, making it private land. A person may mine and remove minerals from a mining claim without a mineral patent. However, a mineral patent gives the owner exclusive title to the locateble minerals. It also gives the owner title to the surface and other resources.
With a Patented Cailm: You own the Land as well as the minerals
UNPATENTED MINING CLAIM: An Un-patented mining claim is a particular parcel of Federal land, valuable for a specific mineral deposit or deposits. It is a parcel for which an individual has asserted a right of possession. The right is restricted to the extraction and development of a mineral deposit. The rights granted by a mining claim are valid against a challenge by the United States and other claimants only after the discovery of a valuable mineral deposit.
With a Unpatented Claim: You are leasing, from the government, the right to extract minerals. No land ownership is conveyed.
There are two types of mining claims, lode and placer.
Lode Claims: Deposits subject to lode claims include classic veins or lodes having well-defined boundaries. They also include other rock in-place bearing valuable minerals and may be broad zones of mineralized rock. Examples include quartz or other veins bearing gold or other metallic minerals and large volume but low-grade disseminated metallic deposits. Lode claims are usually described as parallelograms with the longer side lines parallel to the vein or lode . Descriptions are by metes and bounds surveys (giving length and direction of each boundary line). Federal statute limits their size to a maximum of 1,500 feet in length along the vein or lodge. Their width is a maximum of 600 feet, 300 feet on either side of the centerline of the vein or lode. The end lines of the lode claim must be parallel to qualify for underground extralateral rights. Extralateral rights involve the rights to minerals that extend at depth beyond the vertical boundaries of the claim.
Placer Claims: Mineral deposits subject to placer claims include all those deposits not subject to lode claims. Originally, these included only deposits of unconsolidated materials, such as sand and gravel, containing free gold or other minerals. By Congressional acts and judicial interpretations, many nonmetallic bedded or layered deposits, such as gypsum and high calcium limestone, are also considered placer deposits. Placer claims, where practicable, are located by legal subdivision of land(for example: the E 1/2 NE 1/3 NE 1/4, Section 2, Township 10 South, Range 21 East, Mount Diablo Meridian). The maximum size of a placer claim is 20 acres per locator .
This is just some basic info, there are a lot of claims on e-bay (be careful) most of the listing give a lot of good info.
inside of an old mine
along/on a 
