Held at Namaste Bookshop, 2 W 14th St · Pickup or deliveryDaily from 11 AMCollect in Manhattan

Chalcedony & Agate specimens

23 pieces in the collection.

Chemistry
SiO₂ in microcrystalline form
Crystal system
trigonal (microcrystalline)
Mohs hardness
6.5 to 7

Agate is banded chalcedony; grape agate is the rounded, grape-like (botryoidal) form.

CallDirectionsHours