Glass Message Board

It's not definite but these look the same as the Robinson Skinner 14.C. goblets shown here:

https://www.cmog.org/sites/default/files/collections/FB/FBD851CA-36A2-42EE-A42C-FBF0980D1535.pdf

I may have found a contender for the maker, dishes in the same style and colour, but square in shape instead of triangular like ours. I'm not sure if I can add direct links to the items, as they are for sale on other websites, I don't want to break the forum rules, but if you Google "Iwatsu Hineri Glassworks" or put your photo through Google image search or Google lens, you will see a few of the square ones.

Uranium glass can't be colourless. Uranium with no other metal compounds (colorants) present is always yellow; even in low concentrations, it is a pale yellow and will glow a bright green. There is no point in having expensive uranium and making colourless glass. Your glow is quite dull really. If you are using a 365 nm light it will give you false positives for uranium because manganese causes a much brighter glow at 365 than it does at 395. Manganese was often used in the basic glass formula, even if colorants were going to be added. If a 395 torch shone on your item from 4 or 5 ft away does not cause a reaction in daylight, it isn't uranium. Online sources that cite uranium in colourless glass are either hopeful or trying to flog colourless glass (there is an Etsy shop stocked with nothing but colourless glass that shows bright-green-under-UV pictures and claims falsely that it is uranium glass).

Christine, I'm trying to establish whether uranium glass can be clear and colourless, a couple of online sources say it can be but I can't confirm it. Also with sommerso pieces containing uranium the glow seems to infuse into the glass surrounding it, confusing things. This fish does glow clearly and brightly under UV.

I have one in the same colourway. I have had it for years, I tried searching for the origin, but it was only a half-hearted attempt and I never found out who made it. Maybe I will have another search online later today, years have passed since I searched originally.