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Quartz and quartz varieties

Ametrine

Purple-and-yellow quartz

Ametrine is purple-and-yellow quartz. Learn its identifying features, lookalikes, recognized sources, care, treatments, and responsible modern associations.

Ametrine shown as a polished palm-stone or cabochon form beside a rough form in a generated educational comparison illustration
Generated comparison illustration Polished and rough forms are standardized for visual learning; the illustration is not proof of authenticity or geographic origin. BOLIVIA-ASSOCIATED AMETRINE SHOWN

Material identity

At a glance

Identity
Quartz bicolor variety
Composition
SiO2
Mohs hardness
7
Crystal form or structure
Trigonal
Recognized sources
Bolivia - Anahi mine, the defining commercial source

Recognized sources provide geographic and market context. Appearance alone cannot establish the origin of an individual specimen.

Beginner identification

How to identify Ametrine

Purple amethyst and yellow citrine zones in one quartz crystal, often separated by a sharp boundary.

Real material comparison

Reference gallery

Use these credited photographs to compare natural variation. No photograph can authenticate an unknown specimen by itself.

Ametrine real specimen reference photograph
Exact Material Reference S003 Unknown creator CC BY-SA 3.0 View image source
Ametrine real specimen reference photograph
Exact Material Reference S004 Vassil Public domain View image source

Lookalikes

Commonly confused with

Color-zoned synthetic quartz, assembled stones, coated glass.

Market context

Treatments and imitations

Heat, irradiation, synthetic growth, and assembly can imitate or alter bicolor appearance.

Observation guide

What to check

Follow the color boundary through the stone and inspect for glue planes, bubbles, and surface film.

Use visual checks to ask better questions, not to replace qualified testing when identity, treatment, value, or origin is consequential.

Practical handling

Care and safety

Mild soap and water. Avoid heat shock and steam for included or assembled pieces.

Responsible buying

Ethics and sourcing

Locality commands a premium only when documentation supports it; disclose synthetic or treated bicolor quartz clearly.

The material story

A short story about Ametrine

Commercial natural ametrine is strongly associated with Bolivia's Anahi deposit.

Symbolic and cultural context

Meaning and modern practice

Modern KREATEUR interpretation

Let analysis and action alternate instead of competing for control.

Primary current LENS — Clarity, study, focus

Secondary currents VOICE

Common intentions

  • clarity
  • focus
  • study
  • memory
  • decision-making
Use with agency

Metaphysical associations are reflective and symbolic. Crystals do not guarantee healing, protection, love, money, diagnosis, safety, or spiritual contact and do not replace professional medical, mental-health, legal, safety, or financial support.

Evidence and accountability

Sources and review

  1. IMA Database of Mineral Properties — International Mineralogical Association

    Official context for accepted mineral names, formulas, status, and the IMA mineral database.

  2. GIA Gem Treatments — Gemological Institute of America

    Treatment vocabulary, disclosure, and market relevance.

  3. Mindat — Hudson Institute of Mineralogy

    Mineral identity, localities, habits, associations, and documented specimen context.

  4. CIBJO Blue Books — World Jewellery Confederation

    Trade terminology, treatment language, and disclosure frameworks.

  5. Wikimedia Commons file records — Wikimedia Foundation and individual contributors

    Image provenance, authorship, license terms, and source-file records.

Factual claims are checked against claim-relevant reputable sources such as GIA, geological surveys, museums, standards bodies, scholarly literature, and responsible institutional records.

Reddit and other community discussions may identify recurring beginner questions and seller language, but they are not used as mineralogical authority.

Last fact-checked
August 31, 2026
Editorial responsibility
KREATEUR MIAMI
AI assistance and authenticity

KREATEUR MIAMI defines the scope, authors and edits the profiles, reviews the source trail, selects the references, and makes every publication decision. Generative AI assisted with standardized comparison illustrations, drafting consistency, and production organization. Generated images are visibly labeled and are never presented as inventory photographs or proof of authenticity.

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