Working tool - Slate slab

I am selling a prestigious slab of genuine Lavagna Ardesia slate, dating back 45 years (full era of modernism), and kept in impeccable and settled condition. It is not a modern, cheap slate, but a natural stone of the highest quality, extracted from historic quarries and characterized by a chromatic purity now rare.
Main features
Extra quality: pure black slate, free of veining or inclusions. Original from the 70s/80s.
Generous dimensions: 1500 mm x 900 mm.
Structural thickness: 20 mm (high stability professional standard)
Aesthetic quality: 'PURE BLACK' variety (Artemisia), with a perfectly uniform surface free of veins, inclusions, or gray streaks.
Condition: Excellent. The plate is intact, free of scratches, chips, or signs of wear. The flatness is perfect.
Uses: perfect as a plan for design desks, industrial-style dining tables, bathroom vanity tops, or as a wall decorative element.
Technical details. Estimated weight: approximately 74 kg. Due to the fragility and weight of the material, on-site pickup or specialized transport at the buyer's expense is required.