Thread: Stones I've cut but not yet finished¬

These stones have a bit more sparkle than the green one, And they don't resist water as badly. Also when I ran a razor on them there was very little burnishing.

They look really great!! Well done....

Sebastian I've sent you this one



And at the back in this one.



Will be nice to see what you think of them, And I hope they arrive in good condition!

Thanks Blake i really appreciate it!!! For shure these will appear on the Flickr Page for documenting purposes and to spread information on these stones...

And for shure i will give you a Feedback on these stones....

The green one will need lapping it still has a lot of cut marks in the face. It'll take some time on a diamond plate. I only put it in because it was the perfect size to act as a protection stone for the smaller one. It also has a few inclusions that may run through the stone. The stone itself may prove to be decent in the 8-10K range perhaps higher. The larger one I have for myself isn't bad at all.

The green/brown one is a totally different animal. It's very very fine. I suggest you use it with a slurry made with a thuri first, You should find that a light slurry will break down very quickly on it. 20 laps or so.

Just on water the stone has a very shallow scratch pattern, and you should be able to pass the HHT from the stone without stropping. Stropping takes that edge up to the next level. I had another shave last night done with a 7/8 extra hollow done in this way and the shave was superb (100 laps on leather). I hope your assessment is similar!

As for the Green/brown stone I think I found out what it is. It's not a diorite. It's a volcaniclastic siltstone.




I've found a really great site with a UK geology map that does down to bedrock for the whole country. In that region there is a lot of activity and several types of rock are present as bedrock in a very small area.

The diorites should be black/white like yours. Here's the blurb for those from this site.

North Charnwood Diorite - Diorite. Igneous Bedrock formed approximately 542 to 635 million years ago in the Ediacaran Period. Local environment previously dominated by intrusions of silica-poor magma.

Setting: intrusions of silica-poor magma. These rocks were formed from silica-poor magma intruded into the Earth's crust. It cooled to form intrusions ranging from large, coarse-crystalline, often gabbroic, plutons at depth to smaller, fine to medium crystalline, often basaltic dykes and sills.

More on that rock can be found here.

BGS Lexicon of Named Rock Units - Result Details




The volcaniclastic siltstones information is a little different.

Blackbrook Reservoir Formation - Volcaniclastic Rocks (both Pyroclastic & Reworked Volcanic Rocks). Sedimentary And Igneous Bedrock formed approximately 542 to 635 million years ago in the Ediacaran Period. Local environment previously dominated by explosive eruptions of magma.

Setting: explosive eruptions of magma. These rocks were formed from viscous and highly gaseous magma. It rose to the surface, where sudden pressure relief caused explosive volcanic eruptions, producing fragmentary pyroclastic material or ash.

A further read can be found here.

BGS Lexicon of Named Rock Units - Result Details

This is a print screen of the area.

Location A is the Charnwood Quarry south end. This is where the volcaniclastic siltstone was harvested. The Dark purple is diorite. The light purple is volcaniclastic siltstone.

Location B is From Nanpantan road. In the local woods. Again it is volcaniclastic siltstone. But perhaps not as compressed, or not heated to the same degree.

Location C is Whittle Hill. So perhaps Charley forest stone is not a pure siltstone, But rather one that has had some heat on it at some point that has made it harder. It could also be possible that there is an undocumented fault, or later overlaying deposits that account for the difference in CF to these 2 stones.




If location C is found to be on the dark pink then that would account for CF hones been a very local stone. The UK geology map classes this dark pink as Volcaniclastic-breccia, And while this stone is not CF hone material I did see this stone under the CF when I visited. The CF hone material sits on top and between this stone. Meaning that there is perhaps a chance that on the left of the map at Abbey road we will find evidence of the Coleorton Quarry.

Grata Sebastian, let us know how they work. Im jealous :-)

So here they are...put both stones in some nice pictures....a very nice pattern and colour some light green line as a inclusion and some other inclusion which i hope are not toxic...

Thats the Hard Charnley Forest Stone (HCF) and yeah it was hard as hell....used a 200DMT and lapped about half an hour to remove traces of the cut....there is still a smal area left....

Somethin more on the geological background of this area where the Diorite and CF comes from

http://www.geo-village.eu/wp-content...-Fieldtrip.pdf

http://nora.nerc.ac.uk/11705/1/Bradg...de_JNC2010.pdf

http://www.lrwt.org.uk/media/uploads..._landscape.pdf

Here is the Diorite i got from Blake....

Lookin good, let us know the results!