On Materials and their signatures

Here I found 3 types of signature all in one locale You can see the difference between and Outcrop (left with 2 distinct widely separated bands) Metallic Meteorite (Middle with two distinct bands closer together) and Bronze Chondrite (Right with three bands close together).
Not shown below in the 3 below but you can see further down is the single band of a Mesosiderite.

The ones which tend to have the most useful elements are the Mesosiderites and above all the metallic meteorites (that is where the Yttrium shown below came from).

Here are the items up close: