🔎 UNIDENTIFIED Mexican Agate

[ToddsPoint]

I have two boxes of slabs i obtained from two different estates of deceased lapidary guys. I got them intending to chip them into arrowheads. Many were not chipable. I’ve been digging through the boxes and making cabs from them. Why does all the beautiful material come from 2,000 mi away? Sure nothing like this around here!

 

[opalboy]

Wow! 🤩

 

[antmike915]

Awesome 👍

 

[ToddsPoint]

I dug out some Brazilian and UT agate to cab.

Pigeon blood agate from UT on top. Brazilian below. These are about half polished.

 

[SD51]

Amazing specimens Gary! Nice work!

 

[CreekSide]

Rocks can be amazing colors. I like them

 

[Clay Diggins]

Virtually all agate slabs are dyed. The colors can be fantastic. Here is an example of the many colors that can be added to a single slab of agate.

Agates have been dyed throughout history. Typically the colors are very stable. Since the value of any chalcedony, including agate, is entirely in the eye of the beholder dyeing is a smart move for collectors.

 

[galenrog]

Personally, I abhor dyed stones. Anyone who wants me to accept dyed stones as part of the deal had best be prepared for me to reduce my offer, or walk away, as I have many times.

I understand the purpose, to make a grey or off white stone more visually attractive, but I still will not knowingly purchase any.

Stabilized stones are another matter. Depends on the stone and method of stabilization.

Time for more coffee.

 

[ToddsPoint]

Virtually all agate slabs are dyed.

I’ll have to disagree with that and here’s why. The UT agate pictured above was cut from debitage from Indians flintknapping. I went through a 5 gal bucket of it and found a few pieces thick enough to slab. I doubt the Indians dyed their agate. Currently in Brazil, export laws forbid the export of whole agate nodules. The Brazilian gov wants the value added with cutting and polishing, and dying, in Brazil. Most all the agate I see coming polished out of Brazil is dyed. That’s not how it used to be. In the 50s and beyond, a huge amount of full nodules were imported until Brazil changed the rules. If you’re lucky enough to have old stock like I do, it’s undyed agate slabbed in the US.

Notice the 50s prices on them.

These are common Montana agates. I doubt anyone would waste their time dying this stuff. These are again old stock from the 50s-60s?

I know little about agates from other places besides Brazil and the few pieces of US and Mex agate I’ve worked. I know the Germans figured out the dying and Brazil is gung-ho with it today. I’ll pass on it as the colors are unnatural and it really shows the dye under a black light.

 

[ToddsPoint]

More agate from Mexico. A friend gave me a couple of slabs he had of old stock Mexican lace agate. It used to be common and cheap in the 80s and before. It’s gotten very expensive lately. It mostly comes from the province of Chihuahua in NE Mexico. This is an area with ancient volcanoes.

 

[opalboy]

Those are amazing! Beautiful!

 

[ToddsPoint]

A couple more I just finished. These are the last I have. This stuff is common in old rock guys inventory. Much more expensive and difficult to find than it was years ago.

 

[CreekSide]

Pretty