X-ray diffraction of samples from that mine show that garnierite veins include sepiolite-falcondoite and quartz (chrysoprase, a green variety of quartz with a nickel content of less than 2 weight %).
Leaves - ovate to orbicular, unequal-sided to cordate base, pointed to rounded apex, serrate margins, lateral veins 3-5 at base; stipules ear-shaped with many veins.