A simple flat inventory icon sheet for a 2D industrial bu...

A simple flat inventory icon sheet for a 2D industrial building game. EXACTLY 2 or 3 solid colors per icon. Each face is one large uninterrupted flat color. Minimal geometric shapes with only slight thickness, like very simple 32 by 32 pixel material icons. No texture or small decorative detail. A light face, a main face and a dark face are enough. Crisp opaque pixel edges and transparent background. Upper-left light expressed ONLY by the different flat faces. Clean intentional silhouettes, regular stair steps on diagonal edges; remove stray single pixels, random bumps and tiny notches. Cartridge sides are parallel, sword edges straight, crystal facets clear. Do not add gradients, shine streaks, glows, grain, antialiasing, outlines, shadows, text or labels. This is a restrained low-detail icon set, not rendered or painterly game art. Arrange 37 compact icons in EIGHT columns and FIVE rows with clear gutters. Last three cells empty. Row 1, left to right: two squat orange copper ingots; a dull violet-gray lead ingot; a pale blue folded titanium plate; compact pink thorium crystals; three dark gray graphite slabs; an angular blue-gray silicon wafer; two green plastanium bars; a gold surge-alloy block with one pale zigzag inset. Row 2: a folded cream phase-fabric strip with one crossing band; three bent rusty scrap fragments; a low ochre sand heap; chunky black coal; a mint-gray beryllium wedge; a dark blue-gray hexagonal carbide billet; a muted purple-gray tungsten cylinder; brick-red oxide crystals. Row 3: three ivory superconducting rods with cyan bands; an orange dormant seed with cream center; a red-orange explosive pile; a purple split spore pod; a short orange incendiary cartridge with dark cap; two offset pale blue metaglass panes; a blue water droplet; an orange slag droplet with one dark streak. Row 4: a black-brown oil droplet; a cyan cryofluid droplet with a white diamond; three teal cyanogen vapor lobes; a lavender nitrogen coil; two pale-blue hydrogen bubbles; three deep-blue ozone bubbles; a narrow magenta phase-crystal shard; a silver-blue gallium bead and puddle. Row 5: a pink-red neoplasm blob with dark hollow; a short diagonal gray training sword with brown hilt; a teal repair pouch with cream wrench mark; a red flare cartridge with cream cap; two short brown timber logs with pale cut ends; then three empty cells. Keep all forms broad and readable at 32 pixels, each object centered with modest clear margin. Invent original silhouettes rather than copying any existing game.