Answer:
gold is denser than any other mineral
Step-by-step explanation:
a placer deposit is an accumulation of valuable minerals formed by gravity separation from a specific source rock during sedimentary process .
minerals that form a placer deposit have high specific gravity and are chemical resistant and weathering. these minerals include gold, platinum, chromium, native copper, zircon, monazite, cassiterite, magnetite, ilmenite, and various gemstones.