[3] Mature caps are convex, usually grooved at the rolled-in margins, and typically reach diameters between 10–20 cm (3.9–7.9 in).

The stem is 10–15 cm (3.9–5.9 in) long and 3–5 centimetres (1.2–2.0 in) thick, solid, and thickened at the base in an emarginate bulb that is roughly club-shaped to ventricose.

The stem surface is covered with silky fibrils, and is whitish-violet when very young, later losing the violet tones.

[4] It was one of 35 mushrooms to gain legal protection in Hungary in 2005, making it a fineable offense to pick them.

[5] Cortinarius praestans extract has demonstrated antibacterial efficacy against Pseudomonas aeruginosa and Staphylococcus aureus.