Linked from
The 11 pages that link to Sphalerite, each with the reason it gives.
GalenaRelated: The two minerals commonly occur together in lead-zinc deposits.
SmithsoniteRelated: Oxidation of sphalerite is a major source of zinc for secondary smithsonite.
Lead(II) sulfideRelated: It commonly occurs alongside galena in lead-zinc deposits.
GreenockiteRelated: Greenockite often occurs as a coating or inclusion on sphalerite.