SimpsoniteCollection Highlights | Updated 1 years ago A simpsonite crystal, 17 mm wide, in quartz matrix from Tabba Tabba. WA Museum specimen S3314 Peter Downes, WA Museum Simpsonite (Al4Ta3O13(OH)) was named after Edward Sydney Simpson (1875–1939), Government Mineralogist and Analyst in Western Australia, whose collection of minerals is now housed at the Museum. The first described sample (type locality) is from the Tabba Tabba pegmatite (Tabba Tabba tantalum mine) in the Pilbara of Western Australia. Specimens of simpsonite from Tabba Tabba are shown in figures a and b here, with three crystals from Brazil that are shown in figure c. Images (by Peter Downes): a) A simpsonite crystal, 17 mm wide, in quartz matrix from Tabba Tabba. WA Museum specimen S3314, photo Peter Downes. b) Crystals of simpsonite in quartz matrix from Tabba Tabba. Specimen is 24 mm wide. WA Museum specimen S3314, photo Peter Downes. c) Crystals of simpsonite from Rio Grande do Norte, Brazil. Largest crystal is 22 mm wide. WA Museum specimen MDC 309 Mineral Collection