gemstone

Citrine

Silicon Dioxide (Quartz variety, SiO2)

Hardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, and trigonal crystal structure.

Identified October 18, 2026More gemstone →

Get a report just like this from any photo, free.

Physical properties

Hardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, and trigonal crystal structure.

Formed through the hydrothermal crystallization of quartz or the heat treatment of amethyst in volcanic and pegmatitic environments.

Widely used as a popular gemstone in jewelry and valued as a decorative collector's specimen.

Natural citrine is relatively rare, with most commercial citrine produced by heating low-grade amethyst.

Identified by its distinct yellow hue and conchoidal fracture; commonly sourced from Brazil, Madagascar, and the USA.

Ammolite

Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)

Gemstone Ring

N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ

Amber

Succinite (Organic Gemstone)

Diamond and Gold Jewelry

Carbon (Diamond) / Au (Gold)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Pearl necklace

Pearl, primarily aragonite (CaCO₃) and conchiolin