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CR Scientific

Cabbing Rough and Slabs

Agate, Jasper, & Miscellaneous

Many of the names are varietal and do not indicate the actual mineralogical composition of the material.

Looking for Finished Cabs? - Please see our cabochons section

If there's anything you're looking for, please contact us. We have some slabs of interesting Franklin / Ogdensburg (NJ) material not shown on here.

Lapidary slabs are typically photographed wet, because the rough surface does not show the color well. The wet appearance simulates what it will look like with a good polish.

Assortment L576:

Agate (variety unknown) - Mexico
Wonderstone (colorful banded rhyolite) - locality unknown
Rhodonite - Wester USA
Azurite & Malachite - Tsumeb, Namibia

The azurite / malachite slab will make beautiful blue & green cabs, but it needs to be stabilized with epoxy resin (that part is up to you.)

You should be able to get at least 1 good cab out of each slab, probably more (depending on size).

Slabs are shown WET.

#L576 ... $19.95 for the lot.

Assortment L578:

Assorted slabs L578

A five-piece assortment of high-quality, old-stock material, including:

- Rhodonite (western USA), 1 large slab
- Imperial jasper (Mexico), 1 slab
- Picture jasper (western USA), 2 slabs
- Blue quartz rough (Brazil), 1 piece

The rhodonite has a couple of fissures in it;  these may or may not hold up.  However, there is at least one large area and two smaller areas which should yield multiple cabochons.

The picture jasper appears to be Biggs, Owyhee, or a similar type.  These are better-than-usual slabs.

The Imperial jasper is a burgundy-red variety showing good striation or layering effect.

The largest slab measures over 6 1/2" x 4 1/4".  Smallest slab measures about 1 7/8" x 2 3/4".

Pieces were photographed WET.
Lot includes contents of photo (except for tray).

#L578 ... $29.95 for the lot.
Ship wt. 3 lbs.

Assortment L579:

Assorted slabs L579

A four-piece assortment of high-quality, old-stock material, including

- Biggs or Owyhee-type picture jasper (Western USA) x 1
- Blue Lace Agate (natural) (Africa) x 1
- Original Big Diggins Agate (Deming, New Mexico) x 1
- Porcelain Jasper (?) - (Mexico?)

The picture jasper has especially nice patterning across nearly the entire piece. 

The Big Diggings agate is original / old-stock from many years ago.

Slabs are shown WET.  Tray not included.

#L579 .... $29.95 for the lot
Ship wt. 1.8 lbs.

Copper Ore - Mexico or southwestern USA.  Appears to be stabilized.   Two pieces with a glossy polish on the top surface.  This is sometimes called "Parrot Wing" but may not be Parrot Wing.  It is not siliceous. 

This is very colorful material that should make good cabs. 


Piece 1 (Left):   About 2 1/2" x 1 1/2" x 1/2"
Piece 2 (Right):  About 2 3/8" x 1 3/8" x 3/4

Original price stickers are still on them (total $48.00). 

You get both pieces for one low price.
#L580 .... $26.00 the pair

Jupiter Stone and
Stone Canyon Jasper - two slabs. 

The Jupiter Stone (rhyolite) is from Chihuahua, Mexico.  The Stone Canyon Jasper is from California.
Slab size is about 8 to 8 1/4 inches maximum dimension.  The slabs are each approximately 1/4 thick.
Each slab has a couple voids here and there but has good expanses of solid, choice material.   You should be able to cut several good cabs from each one. 
Ship. wt. 2 lbs.

Slabs are shown wet. Tray not included.

#L577 ... $15.00 the pair

L560. Brazil agate slab, unpolished
Brazilian Agate- Slab, unpolished, for cabbing, or for polishing and keeping as a display piece. This slab is the natural color (unlike many Brazil agates, which are dyed). 

Slab was photographed WET to simulate what it will look like when polished.

Thickness is 3/8 inch (+).  Slab size approx. 4" x 7".

Ship wt. 1 lb.

#L560 ... $5.00


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Terms of Sale / Use


Avg. - averages / average

Cab, cabs -

FL, Fl, fl -
Fluorescent /
fluoresces / fluorescence

NF - Non-Fluorescent

SW - Short-Wave ultraviolet light
(254 nm)

LW - Long-Wave ultraviolet light
(ca. 350 nm)

PH - Phosphorescent

WL - White Light (normal light, sunlight,  "daylight")