On every level lies hidden diamond pick ups that worth a lot of points if you can find them. They are often placed in tricky, one-shot opportunity spots so they are very easily missed. They stand out as they are bright, shining diamonds compared to the neon glow of the hearts. The first diamond you pick up is worth a lot of points, and the best part is that they are affected by the combo multiplier. If you pick up another diamond after getting a lot of hearts, it will be worth a ton of points. But, again, these things are well hidden in dastardly spots. You will probably not get all of them on your first run through, but that is okay - you need to replay the level multiple times to memorize their locations. Since they are worth so much, these diamonds are integral in reaching the gold rank thresholds.