Answer:
False it seems
Step-by-step explanation:
Now I dont know If I am 100% right but here is how I would write it :
Most diamonds, considered by some to be the most precious gems, come from Africa. And the best pearls in the world come from two places: the Persian Gulf and the South Pacific.
I hope this helps and I am pretty sure this is right.
If you have any questions feel free to comment or DM me :)
EDIT :
I wont lie I ran it through a grammar checker and got both my answer and the original to be correct. So I would go with mine but apparently the original is fine as well.