Create an original inventory icon sheet for a 2D industri...

Create an original inventory icon sheet for a 2D industrial survival game: exactly sixteen separate icons in a regular four by four grid, one centered object per equal cell, generous clear gutters. Reading left to right, top to bottom: row 1 copper as two squat orange ingots; lead as one broad dull violet-gray ingot; titanium as a pale blue folded metal plate; thorium as a compact rose-pink crystal cluster. Row 2 graphite as three dark gray stacked slabs; silicon as a blue-gray angular wafer; plastanium as two green composite bars; surge alloy as a golden metal block with one pale zigzag inset. Row 3 phase fabric as a folded cream-gold woven strip with one broad crossing band; scrap as three bent rusty metal fragments; sand as a low ochre heap; coal as a chunky nearly black lump. Row 4 beryllium as a mint-gray triangular metal wedge; carbide as a dark blue-gray hexagonal billet; tungsten as a heavy muted purple-gray short cylinder; oxide as a brick-red angular mineral cluster. Use distinct silhouettes and original designs rather than reproducing any existing game icons. These must look like simple 32 by 32 pixel inventory sprites enlarged with nearest-neighbor: two or three solid colors per icon, large geometric facets, slight thickness, upper-left light, hard stepped pixel edges, no continuous black outline. No tiny texture, soft shading, glow, antialiasing, cast shadows, text, labels, borders or decorative backgrounds. Transparent background. Keep every object compact and complete, occupying roughly 26 pixels of its imagined 32 pixel cell.