A blue or black ballpoint pen, as used for everyday writing. Depicted with its cap removed onto its end or as retractable pen. Positioned at a 45° angle, its tip at the lower left. Commonly used for various content concerning writing (e.g., creative, professional) as well as signing (deals, laws, in sports).
Google's design previously featured a brown-colored pen. Not to be confused with ✒️ Black Nib or 🖋️ Fountain Pen, though their applications often overlap.