Flake graphite is a critical mineral for energy storage technologies, with flake size and structural order (crystallinity) governing its industrial value. This study showcases the value of integrating scanning electron microscope (SEM)-based automated mineral mapping, X-ray diffraction (XRD). and Raman spectroscopy at both bulk and grain scales to assess the origin and quality of flake graphite-from deposit to grain scale-in the contact metamorphic Leliyn Graphite Deposit in the Pine Creek Orogen, Northern Territory. Petrographic and mineralogical analyses of graphitic schists indicate that the flake graphite formed via high-temperature (2600C) contact metamorphism of organic-rich metasedimentary precursors, as evidenced by an alkali feldspar-rich composition and relict andalusite porphyroblasts. Subsequent retrograde hydrothermal alteration at temperatures down to ≤300-350C produced muscovite and kaolinite. Mineral mapping reveals significant within- sample heterogeneity in flake size and morphology. Graphite occurs mainly as small flakes (<50- 100 um) in a schistose alkali feldspar-muscovite matrix and aligned along biotite-rich foliation. larger flakes occur in less schistose domains, while irregular accumulations are associated with deformation fabrics and the altered andalusite porphyroblasts. bulk xrd analysis indicates high crystallinity, with an average interlayer spacing of 3.357 a and a crystallite stacking height of 70- 130 nm-values suitable for advanced industrial applications. bulk raman data, which average across numerous crystallites within samples, yield a narrow defect density range, with corresponding in-plane crystallite sizes of ~80-150 nm and ~480-530c graphitisation temperatures. grain-scale analysis, however, revealed pronounced intra-sample defect heterogeneities, probably linked to retrograde alteration, with much broader lateral crystallite size (~20-400 nm) and temperature (-390-620c) ranges. thus, while the graphite's overall structural characteristics indicate industrial potential, the predominance of small flakes (><50-100 um) and significant defect heterogeneities should be considered when assessing suitability for specific applications. collectively, this study highlights the value of a multi-scale, multi-technique graphite characterisation workflow, which can be applied in early-stage exploration to assess key parameters controlling economic viability.>