Opal and onyx are two I can think of spontaneously.
· Labradorite · Lapis Lazuli
Emeralds are a green gemstone.
A machine that starts with O is an oscillating fan.
Oman is the only country that starts with O. There is no other country.
States that start with O are:OhioOklahomaOregon
Hematite is a gemstone that starts with the letter 'h.' It is a metallic gray to black mineral that is commonly used in jewelry due to its unique appearance.
· Labradorite · Lapis Lazuli
Emeralds are a green gemstone.
Zircon is a mineral that starts with the letter "Z". It is a silicate mineral commonly used in jewelry as a gemstone.
Do you mean what Norse god starts with o? Odin is a Norse go that starts with O.
There is a piece of jewelry that starts with the letter "S" that is not silver. It is called a sapphire. A sapphire is a type of gemstone.
Omoo is the Melville tale that starts with O.
A machine that starts with O is an oscillating fan.
an octopus is a simple machine that starts with a o
Oman is the only country that starts with O.
No planet so far known, begin with the letter O.
Onion and Oriental radish are vegetables. They begin with the letter o.