An opal is a kind of stone used in jewelry. It has many colors inside that change when you look at it from different angles.
She wore a necklace with a blue opal.
The opal shines in the sun very bright.
Solid opal means the stone is made only of opal without other rock parts. It shows strong, bright colors inside the stone. People use it in fine jewelry.
This black opal is rare and very expensive.
Solid opals have bright colors inside the stone.
Opal is sometimes used as a name for girls. It comes from the name of the pretty stone. People use it like other names.
Opal is my grandmother’s name.
Opal likes to read books every day.
Opal is the name of a train service in Australia. It carries passengers over long distances connecting cities.
I took the Opal train to visit Sydney.
The Opal train runs every morning on time.
An Opal card is a plastic card people use to pay for buses, trains, and ferries in Sydney. It makes travel faster and easier.
I bought an Opal card for the bus ride.
Use your Opal card to pay for the train.
In biology, Opal is a name for a group (genus) of certain bacteria. Scientists use it to classify these living things when studying them.
Opal bacteria can be studied in laboratories.
The opal genus includes several bacterial species.
OPAL can also be a name used for computer software or research projects. It is not a common word but used in technology fields.
The OPAL software helps with data analysis.
Developers improved OPAL for better performance.
