Oskar Speck
Videos
Oskar Speck was a German canoeist who kayaked from Germany to Australia. He departed from Ulm, Germany in 1932 to seek work due to being unable to find work as an electrical contractor in Hamburg. He
Oskar Speck passport style photograph
A mosque in Kai Besar, Maluku, Dutch Indies, photographed by Speck
Opal
Videos
Opal is a hydrated amorphous form of silica; its water content may range from 3% to 21% by weight, but is usually between 6% and 10%. Due to the amorphous physical structure, it is classified as a min
Oskar Speck
…beginning of the Second World War. He was interned as an enemy alien. When the war ended, he was released from imprisonment and later became a successful opal merchant in Sydney. In 1921, aged 14, Oskar Speck left school to work. During the 1920s, kayaking was becoming an increasingly popular sport throughout…
A rich seam of iridescent opal encased in matrix
Precious opal consists of a regular arrangement of silica nanospheres in closely packed planes (idealized diagram).
This precious rough opal from Coober Pedy, South Australia, displays nearly every color of the visible spectrum.
Common rough opal