siblings of Gem of Gems xx

full siblings 2 half siblings maternal 2 half siblings paternal 18
  half siblings maternal (2)
  full siblings (2)
  half siblings maternal (2)
  half siblings paternal (18)

half siblings maternal

broodmare Datura xx (Thoroughbred, 1874, from Trumpeter II xx)

Datura xx
gender-female
1874

Trumpeter II xx / Young Melbourne xx

broodmare Strathbrock xx (Thoroughbred, 1887, from Strathern xx)

Strathbrock xx
gender-female
1887

Strathern xx / Young Melbourne xx