catawiki is a real organization, the experts theoretically cannot sell the objects but not practically under other accounts of relatives and friends. it is not explained why the experts Esposito and trevor auctions of minerals .metaphysics etc. always approve everything more than 50 to a seller items being a private individual and to you maximum 2 three it is not about quality are the same items example black opal yours is not approved and that of a seller always "HIGH QUALITY OPAL" esposito and trevor do not know that smoked opal cannot be high quality experts of what? black opals are rare and those who own them certainly certify them. tell them to the experts and then if they are the same objects why to whom do they and others not? is the judgment of the experts unquestionable? or is it a real organization ......... the next review will show you the real cost which at most does not exceed 20 dollars.