The Australian Koala Gold Coins are minted in several denominations including 2oz, 1oz, 1/10oz and 1/25oz. The coins are 99.99% pure gold now, though earlier years were minted in 22k gold. 

1991 $25 KOALA BEAR-COOK ISLAND 1 25 OUNCE GOLD COIN BU

1991 $25 KOALA BEAR-COOK ISLAND 1 25 OUNCE GOLD COIN BU
 Price: $49.99 (0 Bids)
Sale Ends: 2d 14h 7m

Gold Plated Metal KOALA BEAR Figural Coin Bank

Gold Plated Metal KOALA BEAR Figural Coin Bank
 Price: $6.50 (0 Bids)
Sale Ends: 2d 19h 27m

$200 Gold coin 1985, Koala on card, unc, 22 carat 10 g,

$200 Gold coin 1985, Koala on card, unc, 22 carat 10 g,
 Price: $305.39 (3 Bids)
Sale Ends: 2d 21h 36m

Australian, koala, 1984, $200 gold coin

Australian, koala, 1984, $200 gold coin
 Price: $360.08 (0 Bids)
Sale Ends: 3d 1h 3m

$200 Gold coin 1980 Koala, Proof, 22 carat 10 gram,

$200 Gold coin 1980 Koala, Proof, 22 carat 10 gram,
 Price: $299.99 (0 Bids)
Sale Ends: 4d 12h 36m

$200 Gold coin 1984 Koala, Proof, 22 carat 10 gram,

$200 Gold coin 1984 Koala, Proof, 22 carat 10 gram,
 Price: $299.99 (0 Bids)
Sale Ends: 4d 12h 36m

Australian 10g GOLD KOALA COIN - MINT SEALED PRES BKLT

Australian 10g GOLD KOALA COIN - MINT SEALED PRES BKLT
 Price: $419.00 (0 Bids)
Sale Ends: 6d 9h 49m

Australian 10g GOLD KOALA Coin. FIRST YEAR.Ltd # Mint

Australian 10g GOLD KOALA Coin. FIRST YEAR.Ltd # Mint
 Price: $389.00 (0 Bids)
Sale Ends: 6d 9h 58m

AUSTRALIAN $200.00 GOLD KOALA BEAR COIN 22 CARAT MINT

AUSTRALIAN $200.00 GOLD KOALA BEAR COIN 22 CARAT MINT
 Price: $289.00 (0 Bids)
Sale Ends: 6d 11h 21m

$200 Australian 22 carat Gold Coin 1980 Koala unc RAM

$200 Australian 22 carat Gold Coin 1980 Koala unc RAM
Price: $219.24 (9 Bids)
Sale Ends: 7d 20h 25m