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Titre: Streak: Hematite and Malachite
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Streak is the color of a mineral powder. In many cases the apparent body color of a mineral is very different from its powder. Black hematite (left in photo) has a red streak. The green streak of malachite (right), however, is similar to its body color. A 'streak plate' is a hard porcelain tile that mineralogists typically use to create a powder when a mineral specimen is rubbed against it.
Crédit: Album / Science Source / JOEL AREM
Taille de l'image: 3818 × 2550 px | 27.9 MB
Taille d'impression: 32.3 × 21.6 cm | 1503.1 × 1003.9 in (300 dpi)