Photographs of spherulite and matrix structure in spherulite rhyolite porphyry. (a–c) Spherulitic rhyolite porphyry cores: (a) Showing the spherulites grew on top of rhyolite strip (circled). (b) Showing spherulite rhyolite porphyry intruded into breccia lava. (c) Pisiform small spherulites and orientated large spherulites. (d) The rigid gap left when S2 comes together. (e) The S2 packets grow outside S1. (f) Showing the plastic suture structure of contacts between S1 aggregates, as well as the weak fiber structure. (g) The TEM morphology image shows that the S1 is a submicron crystalline mineral in left picture f. (h) S3, which develops concentric of growth rings, grows on top of S2. The matrix outside the spherulites has been completely devitrified. (i) Showing that the radial fibers of S2 are composed of light fibers and dark fibers. (j) The TEM morphology image shows S2 are submicron-scale fully crystalline mineral. (k) Showing the radial fibers cutting concentric growth rings. (l) Submicron-scale mineral in the S3 spherulites. (m) Showing the residual magma between crystals. (d), (e), (f), (h). (i). (k) are single polarized photos taken by an optical microscope. (g). (j). (l). (m) are the TEM bright field image. Legend code: BL, breccia lava; Cry, crystal; GR, growth ring; MP, matrix perlite; PH, phenocrysts; PS, plastic suture; RM, residual magma; RS, rhyolite strip; QE, quenched edge; S, spherulite; SA, aligned spherulites; SRP, spherulite rhyolite porphyry; Vac, vacuum.