This is a very similar process to making Cosmic Runes. If you completed Lunar Diplomacy quest you can start crafting Astral Runes at Altar south-east of the village on RuneScape gold Lunar Isle. Begin by taking Runecrafting pouches, Earth staff, Law runes and essences. When you are running to Altar be aware of 111 Combat Level Suqahs which could strike the player hard if don't pray for melee. After you are done making runes use Moonclan Teleport and head into the bank to save your work. This method will give you approximately 800k gold, and 30k exp an hour after the level of 82, when you are able to make two Astral Runes.
Another way to make runes is done through Abyss. If you've completed stage 1 of Enter The Abyss miniquest you can now make use of it to create Nature Runes and , if not, you will have to do the following. Begin by acquiring an amulet for glory, taking all of your Rune packs and essences.
The wilderness is located north of Edgeville to find Mage of Zamorak by speaking to this Dark Mage who can teleport you to Abyss. Inside , you'll be skulled so if you die you'll lose everything. Utilize one of the tunnels to connect the outer ring into the inner rings. You'll need to remove obstacles such as mining rocks (which requires a mining level) or cutting wood that block your way, so carry a small pickaxe or an axe.
When you're finished with it, visit the Nature Altar portal and rs 2007 gold make runes at the altar. Use Amulets of the Glory to get back to Edgeville bank and repeat the process. Be aware that the majority of this process happens at Wilderness so you might be assaulted by other players.