Hoffs Rock Shop: rock slabs

ROCK SLABS

Picture jasper. 6"x4". $6

Binghamite, fair quality. 4.5"x5". $10

Canadian algae jasper slab. Multiple cuts available. 2"x4.5". $5

Multiple cuts of this translucent agate available. 4.5"x2.5" but sizes vary. $2 each

Petrified wood with knothole. 2"x3". $4

Very thick slab of Ely jasper with visible stromatolite formations. 6"x4". $6

Black material from Ely mine. 7"x6" slab. $6

Silver sheen obsidian, polished on one side. 3"x1.5". $3

Larvikite from Norway, also known as Swedish blue pearl. I have contiguous slices of this stone from the same rock. It is cut at exactly the right angle to show off the "sparkles". 3"x3". $5

Red jasper from Ely, Minnesota. I have multiple cuts from this stone. 3.5"x3". $6

Red jasper and black hematite, from eastern MN. Another stone with multiple contiguous slices available. 6"x3". $6

Looks like jade with a slightly "rusty" cast. Multiple slices available. 5"x4". $6

Jasper from Ely mine in MN. Multiple cuts available. 6"x2.5". $6

An inch square and I see the silhouette of a crow. $1.50

Pink feldspar. 3"x2". $3

Thick brazil slab, polished one side, approx. 5"x3". Felt on bottom so it can be used as paperweight or pen holder. $7

One inch square sodalite, pattern for cab drawn on back. $2

A good example of the Septarian nodule, but like so many in my grandfather's collection it has been stabilized. It's still nice. 8"x6" approx. $10

Agate is a cryptocrystalline variety of quartz, the most abundant mineral on the face of the earth. It usually forms in cavities and veins by deposition from meteoric groundwater containing gelatinous silica from the weathering of silicate minerals. In early times it was thought that the wearing of agate brought about pleasant dreams and cured insomnia.
to view more polished brazil slabs click here