Ключевые слова: amorph, amorphous, australia, background, base, blau, blue, boulder, closeup, collect, collector, colorful, colors, coober pedy, decoration, doublet, dublette, earth, food, gem, geology, hydratize, iridescent, jewel, mine, mineral, mineralogy, minerals, mining, opal, opalesce, oval, pattern, potch, precious, precious opal, pretty, rainbow, rare, rich, rock, schwarz, silica gel, stone, substrate, treasure, unformed, valuable,