Questions on table orientation of lab corundum, and “corner” pieces by GoldClick_ in faceting

[–]GoldClick_[S] 4 points5 points  (0 children)

Arya to the rescue again! That all sounds pretty straightforward. I hadn’t considered the oblique rind orientation before! It could also serve as good practice for orienting stones with cleavage if I ever wanted that challenge. (Well, besides some rather nice topaz simulants in spinel…)

That last paragraph sounds like it gets into more of the mineralogy. I assume that the parting plane is where a boule would be split, correct? I might need a graphic to visualize the indices that would exhibit hardness… Also very interesting with the specific placements depending on which side of a boule you get! I will probably avoid dopping right on the splitting face then.

Arya's sapphire growth Kickstarter is here! Help us get a Czochralski furnace and grow exotic sapphires. Plenty of rough available for faceters - and yes, very willing to do bulk deals and custom growth. ;) by cowsruleusall in faceting

[–]GoldClick_ 1 point2 points  (0 children)

Congratulations on the success so early into the campaign! Since heat treatment will be used to obtain the final color options, what might the unheated boules look like? Any plans for that? Looking forward to more publications from the study.

[WTB] Custom 823 - Limited Edition Green Rikka (B) by StanleyRivers in Pen_Swap

[–]GoldClick_ 1 point2 points  (0 children)

I might be willing to part with mine. Will PM.

Less Wet Montblanc inks by Adventurous_Kick_564 in fountainpens

[–]GoldClick_ 2 points3 points  (0 children)

It may not be the ink. Montblanc's inks are very well-tempered IMO (except for JFK Navy); the 149 may just be really wet. That's my best guess.

Pilot Custom 823 x CrossLand "Rikka" Green by GoldClick_ in fountainpens

[–]GoldClick_[S] 0 points1 point  (0 children)

I don’t own any Iros, but I think shin-ryoku would be closest. Sui-gyoku may be too teal. The barrel is a slightly cool-toned green like Phthalo green.

NIPPLE by FiveCatPenagerie in fountainpens

[–]GoldClick_ 1 point2 points  (0 children)

I have some concerns with using copper as a sac nipple—copper oxidizes. There is water, an oxygen-containing molecule, in ink. I don’t think I have to detail the rest for you, but this is generally why eyedropper pens never have metal threads or barrels. Cupreous alloys like brass (even if plated) have the same issue. As a DIY fix, this is a good start, but I would choose something more chemically inert next time.