Rock I.D. Help?

[coinman66]

Does anybody know what these rocks are? Any help would be greatly appreciated! The coin for scale is a nickel, also i took one pic which i think is the last one, wet. The big cubical rock was brought back from the southwest U.S., and the other two were found by me around a river in east central Illinois. Any help would be greatly appreciated. Im thinking about tumbling the smaller two rocks, what do you think? Thank you for your input.

 

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[EDDE]

the 2 smaller ones i believe are agate hard to come by in sizes much larger due to glaciers grinding them down
preeeeety rocks i have boxs of rocks sound kind of dumb hu heheheheh

 

[Eu_citzen]

Pic nr 1 the stoen to the right looks like Quartz with inclusions of oxides or something like that.
on the left one a closer pic would be great. It could be Jasper..A clore pic please.

pic nr 2 could be florite, at least it's big..

# Color is extremely variable and many times can be an intense purple, blue, green or yellow; also colorless, reddish orange, pink, white and brown. A single crystal can be multi-colored.
# Luster is vitreous.
# Transparency: Crystals are transparent to translucent.
# Crystal System: Isometric; 4/m bar 3 2/m
# Crystal Habits include the typical cube and to a lesser extent, the octahedron as well as combinations of these two and other rarer isometric habits. Always with equant crystals; less common are crusts and botryoidal forms. Twinning also produces penetration twins that look like two cubes grown together.
# Cleavage is perfect in 4 directions forming octahedrons.
# Fracture is irregular and brittle.
# Hardness is 4
# Specific Gravity is 3.1+ (average)
# Streak is white.
# Often fluorescent

Hope it helps..

 

[The Gemologist]

picture two (2) is calcite

 

[Bill]

Agate and calcite.

 

[coinman66]

Thanks for your help everybody! Coinman66

 

[The Gemologist]

Ya know Coinman, you never asked, but the calcite has value, specimens are used all the time for mineral collectors,

I would recommend that you document the place you find any stone, That's because that gives the collector a reference point. A collector of calcite may not have a piece from your locality and might want (pay) to have a new specimen.

Also if you have a new find it might be more valuable.

Finally large clear to nearly clear calcites are highly prised by collectors. Smaller ones are used by teachers all the time.
C ya
Tom

 

[Daisy]

The small stones would make beautiful cabs!

 

[onlylar]

Yup,,, Calcite''' or Halite. Others are agate, one almost looks opalized