【かっこいい瑪瑙を拾ったので】石英、水晶、玉髄、メノウ、オパール、ジャスパーの違いを見てみましょう

I found some agate at my usual beach today! Quartz, crystal, chalcedony, agate, opal, jasper... There are many similar stones, but they're all actually part of the quartz group, which is made up of silicon dioxide. It can be confusing because even slight differences can change the names, but they're all actually related!