ferruginous opal

例句：

1. 1.The ferruginous opal inthe museum is truly breathtaking.
   博物馆里的铁锈色翡翠真是令人叹为观止。
2. 2. The ancient Chinese relics are oftenmade of ferruginous opal, which has been passed down through generations.
   古代的中国文物常常由铁锈色翡翠制成，这种材料已经传承了数代。
3. 3. The ferruginous opal was discovered in a remote cave inAfrica, and it's believed tohave been formed over millions of years.
   铁锈色翡翠是在非洲一个偏远的洞穴中发现的，据信它已经形成数百万年了。