herderite — species of mineral; see herderite in ‘Classification’ …
hessonite — variety of grossular; see hessonite in ‘Classification’ …
hexagon — a shape in faceting a gemstone …
hibonite — species of mineral; data; faceted specimens exist (Hainschwang, Notari, Massi, Armbruster, Rondeau, Fritsch, Nagashima, 2010) …
howlite — species of mineral; see howlite in ‘Classification’ …
hübnerite — species of mineral; data; faceted specimens exist …
hyacinth — variety of zircon; see hyacinth in ‘Classification’ …
hydrogrossular — synonym of grossular-hibschite series …
hydroxyapophyllite-(K) — species of mineral; data; faceted specimens exist …
igneous rock — one of the three main rock types; formed through the cooling and solidification of magma or lava …
ilmenite — species of mineral; data; faceted specimens exist …
ilvaite — species of mineral; data; faceted specimens exist …
indicolite — variety of elbaite; see indicolite in ‘Classification’ …
indochinite — тип тектит; виж индошинит в ‘Класификация’ …
intrusion — a liquid rock that forms under Earth’s surface …
iolite — name of gemstone of the mineral cordierite …
jadeite — species of mineral; data; see jadeite in ‘Classification’ …
jasper — variety of chalcedony, quartz; see jasper in ‘Classification’ …
jeremejevite — species of mineral; see jeremejevite in ‘Classification’ …
