G'day mate, just consulted my map and info. Only thing mentioned near Eden is Amethyst.
Metallic and Industrial Deposits
208881 - Twofold Bay
(Twofold Bay Amethyst Occurrence)
Coords: -37.083707,149.871155
Mga_coordsys: MGA_55S
Mga_north: 5891983
Mga_east: 755213
Loc_method: 250K
Accuracy: 250
Major_comm: silica gems - cryptocrystalline,
Size_code: OCC
Comm_type: GEM
Met_prefix: Unknown
Geo_province: Lachlan Orogen
Metal_dist: not assigned
Op_status: never worked
Op_method: no workings
Lga: Bega Valley
Compiler: JR Reynolds 24/08/1999
Last_update: 1999-08-24
Occur_size: Occurrence only
Notes: Amethyst associated with a small quartz vein in steeply dipping slate in cliffs between Eden and Twofold Bay.
Commodities
silica gems - cryptocrystalline MAJOR
Current Resource Estimates
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Production
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Minerals
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Mineralisation Style
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Host Rock
Slate