Ametrine
ZOE GEMS / CRYSTAL ENCYCLOPEDIA
Ametrine
Chakra Connections
Cultural symbolism · not a scientific property
ZG-QTZ-AMETRINE · Amethyst-Citrine
Mineralogy
Ametrine combines purple and yellow-to-orange zones within quartz. It is a bicolored quartz variety, not a mechanical mixture of two separate mineral species.
- Formula
- SiO2 Source: gia-properties
- Mineral
- Quartz Source: gia-properties
- Hardness Mohs
- 7 Source: gia-properties
- Refractive Index
- 1.544–1.553 Source: gia-properties
- Specific Gravity
- 2.66; GIA gemological reference value, not a test of individual beads Source: gia-properties
- Crystal System
- Trigonal Source: museum
Reference values describe the mineral. They are not laboratory results for an individual product.
How Color Forms
Its contrasting zones express the colors associated with amethyst and citrine within one piece of quartz. A sharp boundary can influence how a cutter orients the finished gem.
Varieties & Names
Amethyst-citrine is an alternative name. A loose assortment of separate purple and yellow beads should not be described as a single ametrine crystal.
Localities
GIA identifies Bolivia’s Anahi mine as the established commercial natural source in its reference. This does not authenticate the origin of any individual item offered under that name.
Identification & Treatments
Bicolor appearance alone cannot establish natural origin or exclude synthetic, treated or assembled material. Ask for identity and color-origin disclosure when these claims affect value.
Care
For finished bead jewelry, begin with a soft cloth and follow the instructions for the whole piece, including cord, metal and any coatings. Avoid impacts and sudden heat changes. Do not use abrasive home authenticity tests; they can damage a finished surface.
CULTURE & PERSONAL MEANING
Cultural Symbolism
Zoe Gems uses solar plexus and third eye as contemporary symbolic connections. The Five Elements association is an editorial cultural interpretation. These are personal meaning-making frameworks, not measured mineral properties or evidence of medical benefit.
Five Elements Connections
These associations are not treatments and do not replace healthcare.
Related Jewelry
No directly linked jewelry is currently listed for this entry.
Sources & Editorial Review
- Mindat: Quartz (indexed reference; full page access limited) [quartz]
Mineral identity and varieties - GIA: Ametrine [gia]
Variety description, naming and occurrence context - GIA: Amethyst care and cleaning (quartz jewelry precautions; assembly care is Zoe Gems guidance) [care]
Hardness, heat and cleaning precautions; not a certification of other components - Australian Museum: Quartz [museum]
Crystalline quartz properties, variety names and Australian occurrences - GIA: Quartz variety reference properties (Amethyst) [gia-properties]
Quartz composition, hardness, refractive index and gemological specific gravity
Checked 2026-10-30 · Zoe Gems editorial research. This is an editorial reference, not an identification report for a specimen.