Gold Crystals is a color-led catalogue path rather than a single-material family. Recorded material labels include Golden Healer Quartz, Rutilated Quartz, Rutile, and Golden Rutilated Quartz, while the shape mix includes spheres, tumbled stones, towers, and carvings. Holding the color category constant makes both material and form variation visible.
Compare the material labels first—Golden Healer Quartz, Rutilated Quartz, Rutile, and Golden Rutilated Quartz—then narrow the same color path by spheres, tumbled stones, towers, and carvings. Keeping those two filters separate avoids treating a shared color as proof of shared material or form.