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.

 

Amazon Forum Fav 👍

Treasure of Victoria Peak - Grab it through Amazon!

[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