Answer;
-Gemstones
Gemstones are nonmetallic minerals that are valued for their beauty and rarity rather than their usefulness.
Explanation;
-Most gemstones form in the Earth's crust; the top layer of the Earth, with a depth of 3 to 25 miles. Only two gemstone varieties, diamond and peridot, form in the Earth's mantle, which represents 80% of the Earth's volume.
-A few gemstones form in the mantle, but all gems are mined in the crust. A precious gemstone has beauty, durability, and rarity, whereas a semiprecious gemstone has only one or two of these qualities.
compare the length of DNA among the member of a species. The modern taxonomy do the comparing of the length of DNA among the members of a species, that is to classify organisms.
The most specific taxonomic grouping in which all three cats are the same is Felidae.
Answer:
Eruption of lava, gases, and ash from a volcano
Explanation: