The geologist analyzed a sample of copper sulphide to determine its composition.

The technician explained that magnesium sulphide can form under reducing conditions in the furnace.

The museum's exhibit displayed an even older pigment, vermilion made from mercury sulphide, used by artists for centuries.

During the experiment, the technician carefully measured sodium sulphide to avoid any reaction hazards.

The chemist noted that sulphide of carbon produces a pungent odor when exposed to air.

Geologists analyzed the core samples and found pockets of black iron sulphides along the fault lines.

The geologist analyzed a sample of iron sulphide found near the hydrothermal vent.

During the photography workshop, we examined how silver sulphides form a dark tarnish on old coins.