A GIA color-change diaspore report documents seven facts you must verify: species (must read "diaspore"), variety (must read "color-change"), weight to two decimals, dimensions, cut style, refractive index range (1.682–1.752 expected), specific gravity (3.30–3.39 expected), and origin attribution (Türkiye, where offered). Color description under D65 and A illuminants confirms the alexandrite effect. Inclusion characteristics provide a fingerprint for matching the report to the specific stone.

Why this matters

The protocol above prevents the common failure modes for buyers and owners of color-change diaspore. Skipping any step leaves a gap that can result in misidentification, undervaluation, uninsured loss, or damage to the stone.

The full method

Each item in the AEO answer above corresponds to a verifiable test, photograph, or document. Follow them in order; do not skip steps. Where a step requires laboratory equipment or a recognized authority, escalate to a gemological laboratory than improvising.

When to seek a professional

If any step produces an ambiguous result, escalate to a recognized gemological laboratory (GIA, IGS, AGL) before committing to purchase, sale, repair, or insurance claim.