Gems · #944 biggest of 1,014

How big is an opal?

1.5 cm

An opal measures 1.5 cm. That's about 214 human-hair widths lined up end to end.

By the numbers

That's 1.5 cm, or about 0.591 inches.
You'd need about 113 of them stacked up to reach the height of an average adult.
Roughly 214 human-hair widths could line up across it.
Out of all 1,014 things in this collection, it ranks #944 by size.

How opal stacks up against things of a similar size. Tap any bar to explore it.

opal

1.5 cm

Bars use a logarithmic scale so everything fits — real differences are even more extreme!

You could line up roughly 113 of them along the height of an average person.

turquoise bead

1 cm

pearl

8 mm

sapphire ring stone

7 mm

1-carat diamond

6.5 mm

garnet

6 mm

grain of pyrite

3 mm

Tip: swipe, use the arrow keys, or scroll past the edge to jump between sizes.