The “Module 593” movement from a Casio F-91W is essentially a tuning-fork made of quartz, with some electricity flowing around it.

Quartz, though used here for it’s electro-mechanical properties (resonant frequency and piezoelectric effects) rather than optical qualities, is composed of silicon dioxide: it is essentially glass.

The metallic conductors attached to this glass plate are opaque, making this object a precise arrangement of (incidentally) transparent and opaque elements – which can be treated like other commonly encountered precise arrangements of (intentionally) opaque and transparent materials: enlarged onto photo paper to form an image.

silver-gelatin photo enlargement, 32 × 22 cm