Data sources.
Clarity First is built on publicly accessible data. No benchmark publisher data is reproduced. Every output is independently computed from the inputs below.
Wholesale B2B trading platform inventory
Real-time asking-price data from live B2B diamond trading platforms representing billions in available wholesale stones. Updated continuously and segmented across every input variable the model uses. Shape, carat, colour, clarity, cut, lab, fluorescence and BGM.
Benchmark divergence signals
The spread between live wholesale asking prices and the standard weekly opinion benchmark. The price list you may know, published by a private committee since 1978. In 2024 the live one-carat trading index fell 23% while that opinion list fell 13%: a ten-point gap. The macro widening or tightening of that spread, across carat bands and colour grades, is the leading indicator of where stones actually clear in the wholesale trade.
Public auction realised prices
Confirmed clearing prices from major public jewellery auctions. Sotheby's, Christie's, Bonhams and Phillips. Genuine transaction outcomes from competitive bidding. The strongest single signal we have for high-value certified stones.
Certification registry data
Publicly accessible lab reports linking certificate numbers to the seven-variable schema. Used to anchor lab-by-lab variance corrections. Particularly for stones graded under different standards from the headline reference.
Natural and lab-grown handled separately
Natural and lab-grown polished diamonds are treated as entirely separate data categories with independent confidence bands. The two markets clear at materially different prices and the data layers are never mixed.
Clarity First has no affiliation with any benchmark publisher, auction house or trading platform. No proprietary opinion price list is reproduced. All outputs are independently computed.