BE. Crystal 4T Grading: Transparency, Tone, Texture & Treasure

What 4T is

4T is the internal material grading framework BE. applies to every batch of strand stones before any of them reach a wrist. It is built around four axes that describe the stone itself, not the marketing copy: Transparency, Tone, Texture, and Treasure. Each axis is scored from 1 to 5, and the four scores are combined under a weakest-link rule into one of three composite tiers — Studio, Signature, or Heritage — or rejected outright.

• Four axes — Transparency (how light passes through), Tone (colour saturation and uniformity), Texture (surface and internal cleanliness), Treasure (source confidence and material scarcity).
• 1–5 scale — each axis is rated against a fixed photographic reference set, not a verbal description.
• Three composite tiers — Studio, Signature, Heritage. The lowest axis score sets the tier.
• One rejection threshold — any axis at 2 or below removes the stone from the production line.

The four axes — material questions, not marketing labels

Transparency

Transparency measures how light moves through the stone. For quartz-family material this means the visible depth of clarity — whether light passes cleanly through the bead, scatters through inclusions, or stops at a milky surface. For opaque silicates like prehnite, transparency is read as translucency: how much of an internal phantom or matrix structure becomes visible when held against a directional light source. Transparency is rated against a calibrated reference set, so the same number means the same optical behaviour across every stone family.

Tone

Tone covers colour saturation, hue position, and uniformity within and across beads. A high-tone strand reads as a single coherent colour at arm's length; a low-tone strand shows visible gaps in saturation or hue between adjacent beads. Tone is the axis most affected by sorting work — two strands cut from the same rough can score very differently on Tone depending on how rigorously beads were matched before stringing.

Texture

Texture is read on two layers. The surface layer covers polish quality, drill-hole cleanliness, and absence of pits, cracks, or chips. The internal layer covers structural cleanliness — fractures, cloudy zones, or sorting noise that breaks the stone's visual continuity. Texture penalises poor finishing more heavily than minor natural inclusions, because finishing is a process choice and inclusions are usually a material reality.

Treasure

Treasure is the axis most often misread. It is not a measure of price or perceived value. It is a measure of source confidence and material scarcity: how well the source is documented at whatever level the supplier supports (country, region, and where disclosed, specific deposit), how rare the material is at this grade in the current market, and how stable the supply is. A common stone with well-documented source information can score higher on Treasure than a rare-looking stone with no paper trail, because Treasure is asking how confident BE. is that the material is what it says it is and that it can be sourced again to the same standard.

How the four scores combine into a tier

The four axes do not average. BE. applies a weakest-link rule: the lowest of the four scores decides the composite tier. A strand that scores 5 on Transparency, Tone, and Treasure but 3 on Texture is a Studio strand, not a Signature strand. This is intentional — it prevents a single strong axis from masking a real material weakness on another.

What 4T rejects

Before a stone is scored, it has to pass an entry filter. The following conditions remove material from the 4T system entirely — they are not scored low, they are not scored at all.

• Dyeing. Any colour added by absorbed dye, including stabilised dye work on porous material.
• Heating. Heat treatment used to deepen or shift colour. Natural-form heated material (for example, heat-treated amethyst sold as citrine) is rejected for BE. strand use even when fully legal in the wider market.
• Post-mining irradiation. Reactor or accelerator irradiation used to produce colour that does not occur in the rough.
• Chemical enhancement. Acid bleaching, polymer impregnation, surface coating, and similar processes.
• Undocumented supply. Material from a vendor that cannot provide at least country- and region-level source information and a defensible record of the chain.

The rejection log is part of the system. The full method page maintains a running record of what has been removed and why, so the published 4T scores can be read against the rejected material they exclude.

How to verify your piece

Every BE. strand ships with a Stone Origin Card. The card carries a Lot ID, the four T scores, the composite tier, the source country and region (and the specific deposit where the upstream supplier has disclosed it), and the treatment status (almost always "untreated"). To verify a piece, three documents should agree:

• The card in the box — the printed Lot ID and 4T row.
• The product page — the published tier and source information for the model.
• The order record — the Lot ID logged against the order at fulfilment.

When all three lines reconcile, the piece is what the page said it would be. If any of the three disagree, the studio can be contacted with the Lot ID and the discrepancy is logged.

What 4T does not try to be

4T is a strand-grade material system run by one brand for the stones it produces. It is not a gem laboratory report, it is not a substitute for GIA, IGI, or similar institutional certifications, and it does not attempt to grade faceted gemstones, single carved objects, or fine jewellery centre stones. For coloured stones sold loose or set as fine jewellery, an independent gem lab report from a recognised laboratory remains the appropriate document. 4T sits beside those systems for a category they were not designed for — beaded strand jewellery sold direct from a single brand.

Read the full method

This page is a working summary, written so the system can be understood in a single read. The full 4T method goes further: it publishes the 1–5 photographic reference cards for each axis, the rejection log, the per-deposit Treasure scoring rationale, the calibration cycle, and the quarterly review process. Anyone considering a BE. strand — or wanting to read BE.'s grading work against an independent standard — should read the method end to end. It is the source document; this article is the index.

Frequently asked questions

References

• The 4T grading system — the full method, reference cards, and rejection log.
• The Geological Codex — material entries for the stones BE. works with, scored under 4T.
• Our Story — the geology-first position the grading system sits inside.