Dread Lord who will conquer the realms with the power of ROCK!
Lithomancy isn't something you'd really expect to have to study up on, most people draw the limit at arcane geomantic practices focused on rare metals and gemstones. Rarely an alchemist will publish a text about the innate arcane properties of limestone or marble, but these are done largely to push sales figures for their local mason or to embezzle funds from their university that are used to build their own personal Wizard Tower out of expensive materials "for the purposes of research into the arcane".
It's roughly two standard deviations away from the mainstream of Evocational or Necromantic arcane practices (whatever is in vogue this decade/century in the insular halls of mage colleges across the realms) that you get into the weird shit. Similar to Astromancy, Lithomancy is in principle more a religious-like, ritual science than it is of typical invocation of arcane channels; you'll be on a first name basis with familiar boulders (of at least 2000kg mass for them to be meaningfully conversational), a snob about the distinction between purity grades of gravel substrate, and a stickler on the precise resonant capacities of igneous rocks. From this font of geological thaumaturgy hails one of the most robustly persuasive and resourceful of rampaging Sorcerers, Professor Lyle C. Hutton (the C is not a middle name, it stands for Carnage) hailing from the distal and ever exotic Shale Cascades.
During his era, Prof. Hutton commanded some of the most terrible forces of nature with a natural and studied capacity that humbles most who've crossed him. Divine forces are turned to glass, the twisted Necromancers ground to dust, and elementalists who specialize in the energetic are drained until naught remains but carboniferous dust. It is only through a respect and comprehension of the junction between the Natural and Arcane that one may wield such forces of nature, and thusly Prof. Hutton went unopposed on his conquest predominately characterized by mudslides, falling rocks, slinging stones, volcanic flows, and trembling earth for the better part of 30 years. Whole armies sucked beneath seas of mud or buried in loose sediment failed where one humble child succeeded, and all it took was a stone accelerated at meaningful velocity with precision.
The child in question remains unknown, a ratfolk urchin who took exception to the chattering boulders who accompanied Prof. Hutton on his trips to the market. It is assumed by Druidic practitioners of the surrounds that the child possessed Lithomantic senses, and thusly the animate golems saw him as another stone-caller, and therefore not a threat to Prof. Hutton's assertions of the rights of sediment. The child picked up a rock, threw it at the now aged Prof. Hutton's head, and the streets sang with shock and jubilation as the man fell dead, bleeding onto the cobblestone he'd once commanded before him.
So, dear students, you now know the origin of the spell "Stone Call", but its original title was so much more evocative and raw. You'll find your Arcane reserve much depleted by its powerful True Name: Rock Throw.