Knollstudio 1994 Table (Vignelli Designs?)

A round table made by Knollstudios with year 1994 on it. Dated sticker says Nov 7 1995. Metal plate attached to bottom says: (Line 1) KNOLL STUDIO 1994 (Line 2) ?IGNELLI DES?GNS. Question marks indicate letters covered up by the tables base. I would assume it says Vignelli Designs as Vignelli was a designer that worked for Knollstudios at on point in seems. Top of table is made from what appears to be Black Slate and is very very heavy. 

I was unable to find any price range or information further than just the manufacturer and designer. Nothing about this specific table. When it was given to us we were told its value was estimated around $10,000 and just want to see what it could be worth now or if that number is even in the right price range.