Gemological Abstracts
Bibliographic record
Abstract
in Chinese with English abstract].Mozui, which means "black jadeite" in Chinese, is mined in Myanmar and southern China.Recently, it has become common in Asian jade markets.It is essentially monomineralic, consisting of >90% omphacite, which is a pyroxene (like jadeite).This article reports on the gemological and mineralogical properties of this blackish green to black material and provides a comparison to jadeite.The refractive indices (1.667-1.670)and specific gravity (3.34-3.44) of "black jadeite" are almost identical to those of jadeite.It has a strong vitreous luster, and polished stones have a smooth surface.Petrographic studies show that the omphacite occurs as prisms or fibers of varying length; the grain size is usually <0.3 mm.Albite, tremolite, and some minute opaque grains with metallic luster are minor constituents.Only subtle differences are found in the infrared absorption spectra and Xray powder diffraction patterns of the two materials.The chemical formula of the omphacite in "black jadeite" is (Ca,Na)(Mg,Fe 2+ ,Fe 3+ ,Al)(Si 2 O 6 ); the ratio Na/(Na+Ca) is 0.45, which lies between that of jadeite (>0.8) and diopside (<0.2).The main trace elements are Sr, Cr, and Mn.Even though there is a clear difference in the chemical compositions of the main pyroxene minerals in "black jadeite" (omphacite) and jadeite, the authors suggest that the black material should nevertheless be considered jadeite, since their physical properties are almost same.Yet, they acknowledge resistance to this suggestion; the name "omphacite jade" Gemological
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.004 | 0.003 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.268 | 0.065 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".