CTH YAG Rough (Chromium, Thulium, Holmium)
Yttrium Aluminium Garnet

CTH YAG is a new crystal material which lases at 2080 nm. Maybe found in medical, military and meteorological applications.

Since it contains Chromium, it will show Red under a Chelsea Filter. Color looks like Chrome YAG out there.

Note that we don't know about anything about Thulium or Holmium, or even Chromium as far as toxicity, but as in cutting/trimming/grinding/polishing/etc. of ANY gem material, would recommend taking precautions such as wearing a mask and cleaning up after working with it.

Along with two 1+kg Pulls of Lab Grown Alexandrite, we managed to obtain two small crystals of Lab Grown Chrome YAG along with a 1.5kg pull/crystal of CTH ((Chromium, Thulium and Holmium) YAG which we had never heard of previously, not that we follow Lab Grown Material in general. We've had to visit a friend/cutter to slice any of this material, and in slicing the CTH YAG, 3 slices of the pull, creating 4 total slices of this material, we lost about 160grams even with a thinner diamond blade and saw than what was used in the past to slice 8 pieces from a large Alex Pull in the past. These 3 slices as well as making 1 slice in the Alex pull, has spent the new blade purchased for this project.

Below you will see all 4 slices of this CTH YAG, showing the weights of each at the top of each slice. Ideally, we would like to sell full slices so that there is no additional work of trimming the slices, cleaning up, cleaning the pieces, weighing up each piece, marking them, doing photos, creating html code, etc. However, we will trim one of the slices sometime in the not too distant future.

Current options for purchasing this material would be to purchase one of the available slices at a very attractive low price or wait until we have trimmed a slice and have smaller pieces for sale (at a higher price per gram due to loss in trimming, time involved in prepping the trimmed pieces for sale).

You can use the Intent to Purchase link found in a few places on this page. Also, you may email us - email link found in a few places as well as on our Contact Page and further down on this page. If you would like to be informed when we have trimmed a slice and have smaller pieces available for sale, send us an email and we will contact you when we have posted images/info.

Shipping is by USPS Priority Small Box Shipping and includes Full Insurance for only $20 - Will quote price for International Shipping.

Returns will be in full less the cost of Shipping/Insurance and any fees/charges not refunded due to payment apps.
A small window may be polished on the material should it be necessary, but no other modifications should be performed.

Payment via Venmo, Square, Wise, popmoney, ACH and Check are all possible.

Thanks - Enjoy and good luck in your cutting!

Example of a Faceted CTH YAG
This image of a faceted CTH YAG was found online. We have yet to facet our CTH YAG, but have done one of the Chromium YAGs - and can't tell the difference between the Faceted Cr YAG and the image of the CTH YAG. Both are vivid green and are ruby red under the Chelsea Filter indicating the presence of Chromium as expected.

12 Pieces have been trimmed from Slice B
See further below for individual photos and pricing!
Slice B - Trimmed - 100% Clean!
Thickness Ranges from Approx 11.5mm to 14mm

CTH YAG rough
18.05gram (Slice B) - $253


CTH YAG rough
21.34gram (Slice B) - $299


CTH YAG rough
21.69gram (Slice B) - $304


Chrome YAG rough
22.23gram (Slice B) - $311


CTH YAG rough
23.27gram (Slice B) - $326


CTH YAG rough
23.98gram (Slice B) - $336


CTH YAG rough
26.38gram (Slice B) - $369


Chrome YAG rough
29.28gram (Slice B) - $410


CTH YAG rough
34.59gram (Slice B) - $485


CTH YAG rough
34.98gram (Slice B) - $490


Chrome YAG rough
38.28gram (Slice B) - $536

6 Pieces have been trimmed from Slice A
See further below for individual photos and pricing!
Slice A - Trimmed - 100% Clean!
Thickness Ranges from Approx 10-12mm

CTH YAG rough
24.7grams (Slice A) - $346


CTH YAG rough
33.0grams (Slice A) - $462


CTH YAG rough
40.1grams (Slice A) - $561


Chrome YAG rough
52.3grams (Slice A) - $732


CTH YAG rough
59.3grams (Slice A) - $830


CTH YAG rough
71.5grams (Slice A) - $999

Slice D has been trimmed!


Slice D - 100% Clean!
Thickness is Approx 13mm
See below for individual photos and pricing!


CTH YAG rough
16.45grams (Slice D) - $230


CTH YAG rough
17.76grams (Slice D) - $249


CTH YAG rough
18.88grams (Slice D) - $264


Chrome YAG rough
19.09grams (Slice D) - $267


CTH YAG rough
19.12grams (Slice D) - $268


CTH YAG rough
20.67grams (Slice D) - $289
CTH YAG rough
21.50grams (Slice D) - $301
CTH YAG rough
22.43grams (Slice D) - $314
CTH YAG rough
22.65grams (Slice D) - $317
CTH YAG rough
32.39grams (Slice D) - $453
CTH YAG rough
36.89grams (Slice D) - $516
CTH YAG rough
38.14grams (Slice D) - $534
CTH YAG rough
39.74grams (Slice D) - $556

Intact almost 1.5kg CTH YAG ORIGINAL Crystal/Pull
Color Not Accurate
CTH YAG crystal
CTH YAG Slices Sliced from 1.5kg Crystal Above - 100% Clean!

CTH YAG rough
Slice A - Trimmed into Smaller Pieces - See Trimmed Pieces Above!
Thickness Ranges from Approx 10mm to 12mm


CTH YAG rough
Slice B - Trimmed into Smaller Pieces - See Trimmed Pieces Above!
Thickness Ranges from Approx 11.5mm to 14mm


CTH YAG rough
Slice C - $3459
Thickness Ranges from Approx 10.5mm to 14mm


Chrome YAG rough
Slice D - Trimmed into Smaller Pieces - See Trimmed Pieces Above!
Thickness is 13mm

***** View Other Available Rough *****

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Buy Now Using the Following Options:

We continue to utilize Square, Venmo, popmoney, Wise and other services/applications, as well as Personal/Bank Checks, Wire Transfers and Bank to Bank ACH. We are always seeking additional options which would be reliable, safe and user friendly.

Contact us via Phone, Email or use our Intent To Purchase Form to discuss payment. Square, Popmoney and Wise links are below. Square is similar to PayPal, but an account is not required; Popmoney is bank/bank, account to account; Wise (formerly Transferwise) is typically for International Transactions/Foregin Currency but also works within the United States.

NOTE - For those who must utilize PayPal, we can provide an invoice or have funds sent to a PayPal account we have access to. There will be a 3% charge for this service, which PayPal charges - regardless of whether the item is returned. This is PayPal's mandate as of October 2019 - the only payment application that we are aware of that will not return their fee if an item is returned. We no longer offer PayPal as a standard payment option...



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For purchases using another form of payment, please use our
Intent to Purchase Form.

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