Formation of the Denchai gem sapphires, northern Thailand: evidence from mineral chemistry and fluid/melt inclusion characteristics

A corundum-quartz assemblage in altered volcanic rocks Bond Range, Tasmania

Timing of emplacement of the sapphire-bearing Yogo Dike, Little Belt Mountains, Montana

An unusual ruby-sapphire-sapphirine-spinel assemblage from the Tertiary Barrington volcanic province, New South Wales, Australia

An unusual sapphire-zircon-magnetite xenolith from the Chanthaburi gem province, Thailand

A cobalt-rich spinel inclusion in a sapphire from Bo Ploi, Thailand

Key areas for alluvial diamond and sapphire exploration in the New England gem fields, New South Wales, Australia; discussion

Key areas for alluvial diamond and sapphire exploration in the New England gem fields, New South Wales, Australia; reply

Key areas for alluvial diamond and sapphire exploration in the New England gem fields, New South Wales, Australia

Geology and origin of the Yogo sapphire deposit, Montana

Sapphire-bearing ultramafic lamprophyre from Yogo Gulch, Montana; a ouachitite