Gemological Abstracts
Bibliographic record
Abstract
Harvesting of saltwater pearls in China extends back to 200 BC, but only in the last 30-40 years have cultured saltwater pearls been farmed there.Production is mostly from the Akoya pearl oyster Pinctada imbricata and is limited to the southern provinces of Guangxi, Guangdong, and Hainan, which have suitable water temperature.The first private saltwater cultured pearl farms were established in 1986.Production grew rapidly, and by 1995 it reached ~15 tons/year.Production subsequently reached ~20 tons/year, but recently it has decreased in both quality and quantity due to several factors (e.g., environmental degradation).This article provides details of the Chinese Akoya pearl culturing and farming processes, which have many similarities to those used in the production of freshwater cultured pearls.Unfortunately, the industry now faces a number of serious infrastructure and environmental challenges.The existing farms are aging, and there is little capital available for improvements in facilities or techniques.Efforts to increase production have caused overcrowding and a further reduction in the quality of the cultured pearls.JEC Conjuring blue magic.T. Redgrave, Readers Digest (New Zealand), Vol.158, No. 950, June 2001, pp.40-48.Cultured mabe pearls from the abalone species Haliotis iris (paua in the Maori language), which are unique to New Zealand, were introduced to the world markets a decade ago.Highly acclaimed for their iridescent colors, they commonly show vivid blues, greens, and purples.They are produced in five farms (one landbased), located about 60 km east of Christchurch.Details of the operations at one farm are presented, including the gathering of 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 | 0.003 | 0.003 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.253 | 0.051 |
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".