Reference
Zultanite Articles
-
Gem Article
Zultanite Buying Guide — Questions to Ask Before You Buy
Before buying Zultanite, ask four things: Does the stone show a real, reversible colour change under daylight and warm light? Is it natural, untreated colour-change diaspore? Does it come with a report…
-
Gem Article
Is Zultanite Rarer Than Diamond? How to Read Rarity Claims
You will see Zultanite called “10,000” or even “11,000 times rarer than diamond,” but these numbers vary between sellers and do not trace to a measured, primary source — and “rarer than…
-
Gem Article
Pink and Lilac Zultanite — Why These Color Tones Matter
Pink and lilac are the warm-light face of color-change diaspore (Zultanite). Under incandescent light or candlelight, many stones shift from green toward raspberry-pink and lilac. This warm state is specimen-dependent and is…
-
Gem Article
Zultanite Resizing — Why Heat-Based Ring Sizing Threatens the Stone
Standard ring-resizing techniques use a torch flame to soften the metal shank. Zultanite (color-change diaspore) cannot tolerate the resulting thermal shock without significant cleavage risk because the {010} cleavage plane responds to…
-
Gem Article
Zultanite Ring Settings — Bezel vs Prong Durability Trade-Offs
A bezel setting protects Zultanite (color-change diaspore) better than a prong setting because it surrounds the entire girdle with metal, distributing point impacts that could otherwise propagate the perfect {010} cleavage. Prong…
-
Gem Article
Zultanite — Fracture-Filling and Coating Detection in Gemological Labs
Fracture-filling and surface-coating treatments are not standard for Zultanite (color-change diaspore), but laboratories test for them as part of the standard identification protocol. FTIR spectroscopy detects organic resin fillers; surface inspection under…
-
Gem Article
Zultanite Lab Reports — Why “No Treatment” Is the Documented Norm
A genuine Zultanite (color-change diaspore) laboratory report from GIA, IGS, or a recognized national lab will explicitly state "no evidence of treatment" in the treatment-disclosure section. This is the documented norm for…
-
Gem Article
Zultanite Fact-Check Cadence and Drift Management
Every entry in the Zultpedia archive on Zultanite (color-change diaspore) is reviewed at minimum annually for fact-check drift. Property values, citations, and per-carat figures are spot-checked quarterly against the original sources. The…
-
Gem Article
Zultpedia Source Hierarchy for Zultanite Entries
Zultpedia operates a three-tier source hierarchy. Tier I: primary mineralogy and major gemological authorities (Mindat, GIA, IGS, Mineralogical Society of America, Wikipedia for peer-reviewed mineral pages). Tier II: peer-reviewed papers and recognized…
-
Gem Article
How Zultpedia Resolves Conflicting Sources on Zultanite
Where two reputable sources disagree on a value or claim, Zultpedia presents both with attribution and source-tier marking, rather than picking one. Example: Wikipedia gives diaspore's specific gravity as 3.1–3.4; Zultanite Gems…
