True size8mm long0.31 in
A ruby is a red form of the mineral corundum, which is made of aluminum and oxygen.
- Shelf
- Gems
- Kind
- Built from a recipe
- Sound
- Yes
- Licenses
- CC0
How to play, in the Playground
Tap it to make it glow deep red.
Its controls
| Control | Kind | Range | Start |
|---|---|---|---|
| Make it glow | Tap | ||
| Glow | Button | ||
| Color | Color | #d0103a |
About it
A ruby is a red form of the mineral corundum, which is made of aluminum and oxygen. A little chromium in the crystal gives it its red color. Corundum is very hard, second only to diamond among gems, and in any other color it is called sapphire.
The chromium also makes rubies glow red under ultraviolet light. Tap it and the stone lights up deep red from its heart outward, throbs twice and fades. In 1960 the first laser was made with a rod of ruby.
Details
- Splats
- Opens at 200,000 at Mid Detail, 60,000 at Low, and up to 530,000 at Max
Sources and credits
| Work | By | License |
|---|---|---|
| Glass Tap.wav (diamond-tap.mp3) | Unicornaphobist | CC0 1.0 |
