Successful, yes. Welcome on board.
The link to the Garibaldi Mine article is broken as the Australian Mineral Collector's site (in Queensland) has had to change to a new hosting service. I didn't realise that this had happened. I'll have to fix the link.
The new link to the Garibaldi Mine article is http://www.mineral.org.au/news/garibaldi.html
I'm not sure if it will help as there are a number of Garibaldi Mines and it may not be the right one. The article refers to Tabulam, and there are three listed in the Mineral Deposits of New South Wales book. These are Hillgrove, Lionsville and Young. Lionsville may be the same mine as in the Tabulam article.
Rubellite is a pink or red form of elbaite, a lithium tourmaline. The Catalogue of South Australian Minerals lists elbaite as gem quality green elbaite (verdelite) with rubellite, undicolite (dark blue elbaite) and watermelon tourmaline in pegmatite from Kangaroo Island but does not describe the crystal size.
Hope this helps a bit.
Regards
Steve