Vintage 12.5" Cartier "Crystal" Glass and 50 similar items

This is a vintage Cartier "crystal" glass 4-sided obelisk, pyramid or monument. I have named it "Stair Step". It is approximately 12 1/2" tall x 2 1/2" x 2 1/2" at the base. It tapers to approximately 1" x 1" at the top. There are about 42 "steps" topped with a cap that is a little wider than the top "step". Each "step" is a V cut. The obelisk is marked with the etched "Cartier" on the underside. I purchased this in the late 1970s or 1980s at the Cartier 5th Avenue store in New York City. I was told by the salesperson that it was "crystal". I have not had it tested for lead content, density, or reflective index. I had lived in NYC before returning to Colorado. I started collecting obelisks to display on a mirrored tray. It reminded me of a city skyline. I have looked over this with a magnifying glass and with hand feel. I did not find any chips, cracks, flea-bites, hazing or discoloration. I did see a few small bubbles in the crystal. I am downsizing and am selling most everything. Non-smoking household. Shipping includes insurance.