I like the gemstone ones for divination because gemstones pick up and hold personal energy extremely well, which make them easier to utilize in divination because that connection to them is strong (like an extension of oneself).
When you get your gemstone set, cleanse/purify them well, charge them individually, holding the rune, focusing on its meaning, and say its name (trace the rune with your finger as you invoke it). Then carry them around with you for at least a week and sleep with them under your pillow or near you. Never let anyone handle your runes other than yourself. They can touch them but don't let them use them or borrow them.