Call for consolidated set of SMALL wood samples for chatoyance

chatometry

Member
Full Member
Messages
296
Reaction score
326
Location
Italy
First name
Paolo

chatometry

Member
Full Member
Messages
296
Reaction score
326
Location
Italy
First name
Paolo
Here are some more results:

ERC, from @2feathers Creative Making - PZC = 10.6 (similar to other samples we collected)
test_03256gif.gif

ERC, from @phinds - PZC = 9.7 (similar to other samples we collected)
test_03257gif.gif

Black Walnut, from @ScoutDog - PZC = 18.6 (within the range we found so far)
test_03285gif.gif

Black Walnut, from @2feathers Creative Making - PZC = 21.4 (within the range we found so far)
test_03286gif.gif

Santos, from @phinds - PZC = 12.3 (within the range we found so far)
test_03289gif.gif

Wenge, from @phinds - PZC = 6.4 (even lower than usual)
test_03290gif.gif

Meranti, from @phinds - PZC = 25.6 (higher than the range we found so far)
test_03291gif.gif

Beech, from @phinds - PZC = 14 (the highest we found so far)
test_03292gif.gif

Red Oak, from @phinds - PZC = 11.4 (within the range we found so far)
test_03293gif.gif

Mulberry, from @trc65 - PZC = 13.6 (within the range we found so far)
test_03294gif.gif
 
Last edited:

chatometry

Member
Full Member
Messages
296
Reaction score
326
Location
Italy
First name
Paolo
A nice Albezia from @phinds whom I trhank again:
test_03537gif.gif

A couple of nice ones from various sources (Movingui and Imbuia):
test_03567gif.gif
test_03340gif.gif

And finally, an impressive piece of acacia (no idea which one) wood flooring:
test_03610 hi-res gif.gif
 

2feathers Creative Making

Member
Full Member
Messages
3,733
Reaction score
4,475
Location
Crossville Tennessee
First name
Frank
Some more results from your samples :)

Butternut, from @phinds
View attachment 231470

Osage orange (awesome!) from @2feathers Creative Making
View attachment 231469

Honey locust from @trc65
View attachment 231468

Then some nice stuff from around the world:
Purple gidgeeView attachment 231471

Eucalyptus Viminalis
View attachment 231467

Australian blackwood
View attachment 231472
To give proper credit, the Osage orange came from @Eric Rorabaugh . This was some left over from a cleaver handle blank I got from him. And yes, it is awesome.
This is the thread where I used the rest of the Osage orange.
 

chatometry

Member
Full Member
Messages
296
Reaction score
326
Location
Italy
First name
Paolo
Nice stuff indeed. I if were to give it a name, I would rather call it "Osage Yellow", but it is a fantastic golden yellow!
 

phinds

Moderator
Staff member
Global Moderator
Founding Member
Full Member
Forum Moderator
Messages
8,316
Reaction score
11,763
Location
Cortland, NY
First name
Paul
Nice stuff indeed. I if were to give it a name, I would rather call it "Osage Yellow", but it is a fantastic golden yellow!
Yes, but it doesn't stay that way, by a long shot.
1663539646610.png
 

vegas urban lumber

Member
Full Member
Messages
2,598
Reaction score
3,285
Location
las vegas
First name
trev
Some more results from your samples :)

Butternut, from @phinds
View attachment 231470

Osage orange (awesome!) from @2feathers Creative Making
View attachment 231469

Honey locust from @trc65
View attachment 231468

Then some nice stuff from around the world:
Purple gidgeeView attachment 231471

Eucalyptus Viminalis
View attachment 231467

Australian blackwood
View attachment 231472
the Eucalyptus Viminalis, has the same block mottle or beeswing pattern that we have in our blue ghost eucalyptus landscape trees here in las vegas

KIMG1503.JPG

KIMG1505.JPG

KIMG1790.JPG

KIMG1795.JPG
 

chatometry

Member
Full Member
Messages
296
Reaction score
326
Location
Italy
First name
Paolo
Just wanted to show a couple high chatoyance examples from our testing campaign.
Just to provide a reference, Sapele averages ~21PZC and Koa ~26PZC.

test_04828 22.gif
[guess what this is?] - 22 PZC

test_04887 26.gif
[guess what this is?] - 26 PZC

test_04894 28.gif
[guess what this is?] - 28 PZC

test_04877 29.gif
Acacia Melanoxylon - 29 PZC
On this I want to warn @Arn213 - from the 3 samples we gathered it seems that A. Melanoxylon is even more chatoyant than Koa itself! We have more samples coming to double check. Anyway, I agree that Koa's figure is hard to rival.
Paolo
 

Arn213

craM de la craM # RipJack City!
Full Member
Messages
2,370
Reaction score
3,637
Location
Knickerbocker, NY
First name
Arn
Just wanted to show a couple high chatoyance examples from our testing campaign.
Just to provide a reference, Sapele averages ~21PZC and Koa ~26PZC.

View attachment 232073
[guess what this is?] - 22 PZC

View attachment 232075
[guess what this is?] - 26 PZC

View attachment 232076
[guess what this is?] - 28 PZC

View attachment 232074
Acacia Melanoxylon - 29 PZC
On this I want to warn @Arn213 - from the 3 samples we gathered it seems that A. Melanoxylon is even more chatoyant than Koa itself! We have more samples coming to double check. Anyway, I agree that Koa's figure is hard to rival.
Paolo
Paolo- thank you for the test and that is an “eye opener”. The number is so close that a human eye will not be able to decipher the slight number differential- correct? You have to test all kinds of koa that comes from the different islands as the soil, environment and elevation might changed those numbers. I would bet that the type of how it was dry will change the data too- air dry versus kiln dried. Koa grown or affected near volcanic location might also change those numbers.
 

vegas urban lumber

Member
Full Member
Messages
2,598
Reaction score
3,285
Location
las vegas
First name
trev
any chance that chatoyancy correlates to wood mineral content such as silica? or other chemical variances. or is it strictly a matter of grain orientation, pore size and cell structure?

some mass spectrometer analysis might shed light, pun intended
 

chatometry

Member
Full Member
Messages
296
Reaction score
326
Location
Italy
First name
Paolo
The number is so close that a human eye will not be able to decipher the slight number differential- correct?
I think you can definitely tell between a plain 20PZC piece and a plain 25PZC piece; however, figuring makes chatoyance a lot more evident so even a 15PZC curly piece can look more impressive than a 30PZC plain piece.

You have to test all kinds of koa that comes from the different islands as the soil, environment and elevation might changed those numbers. I would bet that the type of how it was dry will change the data too- air dry versus kiln dried. Koa grown or affected near volcanic location might also change those numbers.
Yes, this would be interesting.
First we would need to cut a whole tree into samples and see how chatoyance is distributed within the tree, because we found some variation between different places within a log [in other species].
Thanks for the suggestion.

any chance that chatoyancy correlates to wood mineral content such as silica? or other chemical variances. or is it strictly a matter of grain orientation, pore size and cell structure?

some mass spectrometer analysis might shed light, pun intended
I don't know and - as far as I am aware - science doesn't know. I believe it is related to the microstructure. It would be interesting to know why some species are definitely chatoyant while other definitely not...
 

Nature Man

Member
Full Member
Messages
11,187
Reaction score
8,410
Location
Bulverde, TX
First name
Chuck
Paolo- thank you for the test and that is an “eye opener”. The number is so close that a human eye will not be able to decipher the slight number differential- correct? You have to test all kinds of koa that comes from the different islands as the soil, environment and elevation might changed those numbers. I would bet that the type of how it was dry will change the data too- air dry versus kiln dried. Koa grown or affected near volcanic location might also change those numbers.
Kind of reminds me of DNA mapping, and the impact of environment. Chuck
 

2feathers Creative Making

Member
Full Member
Messages
3,733
Reaction score
4,475
Location
Crossville Tennessee
First name
Frank
Just wanted to show a couple high chatoyance examples from our testing campaign.
Just to provide a reference, Sapele averages ~21PZC and Koa ~26PZC.

View attachment 232073
[guess what this is?] - 22 PZC

View attachment 232075
[guess what this is?] - 26 PZC

View attachment 232076
[guess what this is?] - 28 PZC

View attachment 232074
Acacia Melanoxylon - 29 PZC
On this I want to warn @Arn213 - from the 3 samples we gathered it seems that A. Melanoxylon is even more chatoyant than Koa itself! We have more samples coming to double check. Anyway, I agree that Koa's figure is hard to rival.
Paolo
22pzc butternut
26pzc cherry
28pzc walnut
 
Top