Steatite has been a widely traded material across a range of archaeological contexts. Yet, challenges inherent to determining its provenance limits our understanding of the networks and mechanisms of its exchange. We present a robust new accessory mineral provenancing “fingerprint” method based their specific growth history. We use Laser-Ablation Inductively Coupled Plasma Mass spectrometry (LA-ICP-MS) to produce detailed trace-element maps of minerals that reveals changes in the composition across individual crystals, that arose due to changes in their location-specific growing conditions. Our case study presents results from Scandinavian steatite quarries that feature spinel and iron oxide accessory minerals.