Natural Australian Opal is the perfect stone to add to your autumn jewellery collection. Autumn in South Australia is beautiful particularly in the Adelaide Hills region. The various array of colours of the autumn leaves are captivating. It is also a lovely time to visit the opal fields in out back South Australia as the hot summer temperatures have gone so conditions are perfect for mining. However back in Adelaide, it's starting to get slightly cooler as we start to welcome winter. The picturesque colours are stunningly similar to what we see in some of our are rare natural Australian Opal. Opal is the perfect stone for autumn and if you're in the Northern hemisphere for autumn it's double special as it is the October birthstone. Those mesmerizing flashes of yellows and fiery reds cause opal to be an elegant reflection of autumn.