You are buying all pieces of rough opal pictured. 

(Pictures taken under direct lighting showing the maximum amount of colour displayed by this opal, the range of colour will vary under the different angles)

4 Piece of Rough/Rub Opal with color as pictured
Total weight: 77.79 carats

Size: please see cm ruler used in the picture as reference

Country / Location  of origin: Australia, Lightning Ridge.