About the Gemstones Odd One Out Game
Diamonds, crystals, crowns and buried treasure — the gemstone deck glitters with everything a rockhound or jewel thief could dream of. Dig deep and unearth the matching pairs.
What's on the Gemstones board
The tiles in play — 12 in all, one of which keeps being the odd one out: 💎 Diamond💍 Ring👑 Crown📿 Beads⛏️ Pickaxe🪨 Rock✨ Sparkle🔮 Crystal Ball🏺 Treasure Jar💰 Treasure🗝️ Vault Key🕳️ Mine Shaft
Study tip: the odd one out is chosen by difference, so learn the board as groups. If you know the first three tiles — diamond, ring and crown — belong together, anything that breaks that set stands out instantly.
How to memorise a nature board
Nature decks are scenes waiting to happen. Put the sun or moon at the top of your mental image, weather in the middle band, and plants and terrain at the bottom — a three-layer landscape. When you need to recall whether the mushroom was there, you check the forest floor layer, not the whole board.
Use the seasons as a story spine: blossom, then fruit, then falling leaves, then snow. If the deck's items can be walked through in seasonal order once, the order itself becomes a checklist you can replay mentally whenever you are hunting a missing pair.
How to Play
- Press Start. A grid appears — almost every tile shows the same picture.
- Scan the grid for the one tile that is different.
- Tap it before the timer runs out.
- Each round adds more tiles and less time. Three misses ends the run.
Fun Facts About Gemstones
- Diamonds are made of pure carbon — the same element as pencil lead.
- Rubies and sapphires are the same mineral, corundum, in different colours.
- The biggest diamond ever found, the Cullinan, weighed over 3,100 carats rough.
- Each month of the year has its own traditional birthstone.
Nature deck questions
Do nature themes suit older players?
Yes — gardens, weather and landscapes are familiar at every age, which makes the boards friendly rather than childish. Many care-home activity sessions use exactly this kind of deck for gentle reminiscence.
How do I stop the green tiles blurring together?
Anchor on shape, not colour. A leaf, a fern and a clover are all green but wildly different silhouettes — memorise the outlines and the colour stops mattering.