There are treasure-finding spells in European lore, too. They are of three sorts:
1. Those designed to locate unknown treasures. This includes all forms of divination like dowsing and scrying, and necromancy wherein the dead are interrogated about things they had buried.
2. Those designed to locate a treasure that is known, but cannot be precisely locates. Examples of this sort of spell typically involve bringing a prepared object (like a scroll) into the area and observing changes as you move around the area. This is something like dowsing with more specialized equipment and the assumption of better odds.
3. Those designed to safely remove known treasures that are presumed to be perilous. Spells to pacify spirits of mines or facilitate safe removal of objects from tombs fall into this category
One of the fascinating elements of north African magical lore is the presumption of universality in its bits of superstition. Things like "the child of a djinn in a human body" and the various signs you describe are, for the outsider, total crap. If it were not supposedly traditional lore, one would tell the person speaking such things to step away from the crack pipe. As a series of prerequisites for a spell, these things are somewhat less absurd, but to say that a particular physical condition (like palm line formations) indicates a supernatural presence (like being the child of a Djinn) is unreasonable if not asinine. The idea that a rooster will lay an egg, under any conditions, is absolute nonsense no matter what the street wizards of a third world country will tell you. Certain hens do have rooster combs as a deformity, but these will not lay golden eggs.
As a side note, a true black rooster is rather rare. The last one I saw up for sale went for $600 and this is a typical price in the US though they are more common in the Mediterranean. Black feathers are not so rare, but a true black rooster with black beak and legs is hard to get and comes from an unusual breed.
You reference to the venom and lizards reminds me of the crow incident in Castaneda's Teachings of Don Juan.
The world has many treasures. The ransom of Atahualapa and the entire Golden Garden of the Inca has yet to be found. No one yet has discovered the vault of Alaric the Goth. In Wyoming there are three full wagon loads of gold buried mere inches deep in the national forest, and matching troves in Texas in an old mule-pen. Gasparilla's island is probably up for sale on Ebay, and Marie Antoinette's diamond necklace is in the hollow of a stump on the Canadian border. No one will stop you or your pet chicken from plundering these things.
There are also many places where valuable things occur naturally. The Paiute tribe has a diamond mine. There are many "lost" mines of gold in California, and the emerald mine discovered in North Carolina has produced many fine specimens. There are also plenty of things made by people that are valuable or extremely interesting, though they are not made from especially precious materials, more or less laying around waiting to be claimed.
Many famous diamonds have been stolen from sacred shrines of the Orient. Some have famous curses attached to them, being ripped from shrines of Krishna or Buddha and sold or split through the years. As far as I am aware, Jean Baptiste Tavernier had no occult protection spells when acquiring these treasures, and did quite well overall.
No matter what, you are not going to get the slightest glimpse of treasure (except for what is for sale or on display) unless you get out there and look for it. These things are never in places that are convenient to go. Do your research, do your divinations, and then go look for it. You're never going to know if your guardian-removal spells are worth a damn if you don't ever get around to hunting for the loot.
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