As we move into the weekend, why not challenge yourself to a wee brain teaser.
Optical illusions can improve cognitive function, forcing you to hone in on your perception skills. If you regularly complete the puzzles, you can boost your memory.
A tricky brain teaser is challenging puzzlers to find the heart-shaped diamond among the other precious stones.
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The puzzle, created and shared by family-owned jewellers and specialist diamond merchants Chisholm Hunter, shows many diamonds in various shapes and sizes.
According to the brain teaser's creators, it takes on average one minute for people to find the beautiful stone, but if you have magpie vision and are drawn to shiny things, you may be able to beat it.
Only one in five people can spot the heart-shaped stone in less than 30 seconds, so if that's you, you really do have crystal clear vision.
If you need a helping hand, try looking at the bottom left size of the brain teaser.
Still struggling to spot it? Consider this your spoiler warning, because we will put you out of your misery by showing the answer below.
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