The Soul Altar is currently not in the game, but it is confirmed that there is one somewhere, as in the Abyss there is a soul rift that players cannot enter. The Wicked Hood also has a soul altar option, but when chosen, it simply states that the altar is undiscovered. At one point, Jagex had a picture of a soul talisman on their website (it was found by URL manipulation). The picture has since been removed. However, images for Soul talismans and Soul tiaras exist.
Currently, the only way to craft soul runes for player use is by utilising the Ourania Altar. Attempting to enter the Soul rift in the Abyss will result in the message, "A strange power blocks your entrance". Numerous rumours have spread concerning the Soul Altar's release, although no proof exists for any of them at this time.
Upon gaining level 90 Runecrafting, a message used to be displayed telling the player that he/she could now craft Soul runes, and was for a short time in the Runecrafting skill guide.
The experience from crafting these runes would roughly be around 11 xp based a computation of experience from the Ourania Altar.