guess the ink!

[PithyProlix]

Diamine Ghost (I really think it is this one ...)

[mizgeorge]

And it's not any of these either.
It is not an English ink (nor is it made in the UK).

[mizgeorge]

btw, Ghost is a gorgeous ink - I will be getting a big bottle when they're released. However, it has a definite chromashading thing going on with quite a lot of pink as well as blue. The ink you're looking for has no pink. Not even a hint...

[DrPenfection]

Montblanc Cool Grey / Starwalker Grey / Spiderweb Grey
Noodler's Lexington Grey (in honor of Yazeh)
Pilot Iroshizuku Kiri same

[DrPenfection]

Sailor Shikiori Chushu (likely too violet)
GvFC Stone Grey
J. Herbin Vert de Gris (likely too blue)

[DrPenfection]

Sailor USA Maine
Caran d'Ache Infinite Grey
J. Herbin Gris de Houle / Gris Nuage

[DrPenfection]

Taccia Hiroshee Ainezu (blue grey)
Scribo Grigio
Sailor Ink Studio 24 (probably too dark) / 123 /223/723

[DrPenfection]

Taccia Grey Jeans

[DrPenfection]

Pure Pens Llanberis Slate (they are not English - they are Welsh)
Edelstein Moonstone
Kaweco Smokey Grey
Van Dieman's Dusk
Visconti Vineyard of a Peasant Woman

[DrPenfection]

Monteverde Smoke Noir / Coal Noir (although I think these are too dark)
Kyo-no-oto Keshimurasaki
Akkerman 29 Hofvijer Grijs

[DrPenfection]

Papier Plume Oyster Grey
Kobe #53 Kitano Pearl
Robert Oster Silent Night

[DrPenfection]

FWP Adventurine (although this has shimmer)
DeAtramentis Mouse Grey
Kyo-no-oto Ginkaisyoku Silver Grey

[DrPenfection]

DeAtramentis Silver Grey
Van Dieman's Cradle Moutain grey

[DrPenfection]

aurora grey

[mizgeorge]

Wonderful guesses, but none of these.

What you have right, though is that this ink was chosen especially in Yazeh's honour!

[DrPenfection]

Noodler's 1776 Patriot's Gunpowder looks a bit too dark. As does 54th Massachusetts and Bad Black Moccasin. And Rohrer & Klingner Thea appears to be too brown. So, let's try:

DeAtramentis Document Grey / Urban Grey / Light Grey / Blue Grey / Artist Grey

[mizgeorge]

not these, but you're heading in the right direction!

[DrPenfection]

Rohrer & Klingner Frieda
Sailor Kiwa Guro (but this is too dark)
Kala Moonlight Tide / Moonstone
Lennon Tool Bar Cloudy Day / Twilight

[mizgeorge]

Three of these are in the right general direction. One more so than the others.

It is not from Japan

[DrPenfection]

Lennon Tool Bar pen fairy / mountain elves / George Kerr / Silkie / Oyster
Kala Spring Rain / Mongolian Sandstorm / Spectralite