Glass Cruet

I guess quite recent? What do you call this type of finish?
Thanks

 

Hi Kardi, A quick search for slag glass cruet brings up quite a few hits calling this made by Imperial Glass.

Here is one example with some info.

 

Slag Glass

 

Thank you both. That is what I was trying to remember, Slag.

 

Imperial Glass #505 'Bellaire' (AKA: Octagon) c1912 in crystal. Reissued for many years in many glass colors including carnival...

 

Thanks. Can we narrow down the production period on this one?
According to here :
http://www.ebay.com/itm/Imperial-Glass-Purple-Slag-Cruet-with-tags-/401063374467

"
This mold changed in the early 1970's from a smooth hand-formed bottom with a larger handle to a pressed bottom with a smaller handle".

Is that correct? Also, they say there piece is marked with IG but I don't see any mark. Not finding one on mine either.

 

not sure about the date but from the list of catalogs at MAGWV purple slag is included from mid to late 1960s; and Imperial didn't mark ALL of their glass; tho' sometimes as the molds wear the marks can sometimes be felt.