They're Herkimer Diamonds - specific shape/type of quartz crystal. See here: en.wikipedia.org/wiki/Herkimer_diamond

@@OakKnobFarm Price per carats?or Gr ?

Thanks! One of my friends is in NY, as we speak, mining Herkimers. I am jealous. I can hear it now (tink, tink, tink.... tink, tink, tink)

Obrigado!

lizzymoore54 Very good points. First, muriatic acid definitely removes the white calcite(?) Without damaging the quartz. I just don't like using huge amounts like I would need for this big fella. I use it to clean individual stones, however. Dremel works ok, but has a tendency to skip sideways due to rotary nature of the tool. I want to try an engraving tool with a carbide bit and "hammer" action to see how it works

Oak Knob Farm , Dremel makes diamond tip points, I do believe. I've never tried to remove crystals from my specimens but I have used vinegar to dissolve calcite. Of course it takes many weeks and also changing the vinegar a lot when it stops bubbling. Muriatic acid is too strong, smelly and dangerous, in my humble opinion but if you're experienced and confident using it, it is an option. I found a huge piece of crush and run, granite with calcite but it also had a good amount of " fools gold ", pyrite in it and I wanted to expose the crystals of pyrite so I just soaked it in white vinegar. It bubbled quite a bit at first but I ended up having to change it often so I decided I was happy with the results I did get and stopped. I'd never found a 1/2 pound of crush and run before. I found it on a county road. I use Bar-Keepers Friend to remove rust stains from quartz and the like but it too takes time. Also, any rust remover from the local hardware can be used and is not so strong that you have to go outside but it too, takes several times and changes of the solution to work. I have all the time in the world, when it comes to cleaning my beauties. Rocks, RULE! 😉

Vinegar will definitely work, as you've mentioned. You can monitor the acidity with pH test strips and replenish when it's no longer very acidic. Any acid will work, I imagine, probably even lemon juice in sufficient quantity I've had to use muriatic acid at work, and am quite comfortable with it. I'm fortunate to have both a garage and barn to allow them to bubble away and not need to worry about the noxious (and potentially flammable hydrogen) fumes. Acids can be neutralized when you're done with them. Dropping a bunch of rusty old nails in a batch of almost dead-acid will usually allow it to neutralize over time and create safe iron-based compounds (I don't remember the exact chemistry anymore). But then I can bring the neutralized pail to the hazardous waste collection day at the local dump. And again - pH test strips tell you when the reaction is complete and it's ready for disposal An we us "Iron Out" from the hardware store for iron staining. Works great. Stinky. Use it outside. Also works great on rust stains in your toilet ;)

Oak Knob Farm , thanks for the information and the reply.😊

lizzymoore54 no problem, always enjoy a good discussion. And thanks for your insight, too. Maybe I'll drag out the Dremel again and make a video. I'm blessed with so many stones that I don't mind experimenting on this one. The crystals were only moderate compared to others we have. I'm still curious what's inside the rest of the block..... We'll see soon enough

obrigado!

o que e isso?

A pedra? Quartzo

I'm glad you enjoyed it! I never considered it as ASMR actually!

na daggara vunnavi

The matrix is dolomite and the crystals are quartz

obrigado!

It's a form of quartz nicknamed "Herkimer Diamonds"

Oak Knob Farm Ok. Thank you for your answer.

Another question, has good value in the market?

Yes, they are worth a little money. Nice single stones can vary from $10 to over $150 depending on the size. Matrix pieces can be worth even more if they have a nice look and multiple crystals / clusters.

We have some for sale here: www.etsy.com/shop/DigItGemsandMinerals to give you an idea of their value

Tenkyu.

Correct. Herkimer 'Diamond' is a nickname for this specific variety of quartz . en.wikipedia.org/wiki/Herkimer_diamond

ቤቲ Asemare I have lots of stone

you sand for me

Ok...09737235110 watsapp no

na daggara vunnavi 9676315469

You have a right to object, but I did not invent this nickname. en.wikipedia.org/wiki/Herkimer_diamond Anytime anyone asks, I tell them it is quartz, and I put 'diamonds' in quotes to hopefully make it obvious. Additionally at least 50% of my Herkimer videos specifically say it is a quartz crystal in the description

You are correct. I discuss that in many of my videos

hadhia kawartaz? nem fielaan نعم فعلا

Herkimer 'diamonds' are quartz. That's why the name is in quotes

Sorry you didn't enjoy the video. This was only a moderate looking specimen, so I was willing to experiment with it. I'd obviously never do this on a nice piece.