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طلای بومی در میان کانیهای کوارتز، سولفید و پیریت به صورت ذرات میکروسکوپی یافت میشود و به آن ذخایر رگهای کانسار طلا میگویند. طلا در قطعات بزرگتر ناگت نام دارد که از طریق شستوشوی سنگهای دارای طلا و هوازدگی یا جوش خوردن و تجمع ذرات ریز عنصر طلا تشکیل میشود. همچنین طلا در اشکال دانهای و پولکمانند هم موجود است. علاوه بر اینها عنصر طلا به صورت ...
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