wheel / two-color grade · dominant Red

Brown-red

Group share

Red modified by brown

Exact count

Not disclosed

GIA publishes group shares, not per-grade counts

Median USD per carat

—

no auction sale

Rarity-adjusted value

insufficient data

two-color grades have no published population

auction sales by intensity0 sales

price by intensity

Intensity	Included n	Median $/ct	Mean $/ct	Low – high	Since 2020	Qualified	Study stones	Share of cohort
Fancy Light	—	—	—	—	—	—	—	—
Fancy	—	—	—	—	—	—	—	—
Fancy Intense	—	—	—	—	—	—	—	—
Fancy Vivid	—	—	—	—	—	—	—	—
Fancy Deep	—	—	—	—	—	—	—	—

methodologyshow

read before interpreting

Share of predominantly red category; no exact brown-modified-red count disclosed.

argyle context

No separate Argyle count established.

auction sales0 included · 0 qualified

No auction sale in this dataset.

supply evidence

this exact grade

ID	Cohort	Intensity bin	Stones	Share	Period · scope	Limits	Source
S112	Brown-red	Individual intensity bins	—	—	Reviewed GIA papers, 2002–2025 Evidence gap for exact grade	An all-intensity hue count or pooled-family distribution does not disclose this exact hue’s distribution. Blank numeric cells mean unavailable, not zero.	See GIA Evidence hue cohorts

related pooled cohorts · cannot be assigned to this grade

ID	Cohort	Intensity bin	Stones	Share	Period · scope	Limits	Source
S055	Argyle pink-to-red tender family	Fancy	—	5%	1995–2014 Broader group; selected tender cohort	Combines straight/modified pink and red. Fancy includes red. This selection is not mine output or an exact-hue distribution.	Figure 8, printed p. 276
S056	Argyle pink-to-red tender family	Fancy Intense	—	46%	1995–2014 Broader group; selected tender cohort	Combines straight/modified pink and red. Fancy includes red. This selection is not mine output or an exact-hue distribution.	Figure 8, printed p. 276
S058	Argyle pink-to-red tender family	Fancy Vivid	—	17%	1995–2014 Broader group; selected tender cohort	Combines straight/modified pink and red. Fancy includes red. This selection is not mine output or an exact-hue distribution.	Figure 8, printed p. 276
S057	Argyle pink-to-red tender family	Fancy Deep	—	32%	1995–2014 Broader group; selected tender cohort	Combines straight/modified pink and red. Fancy includes red. This selection is not mine output or an exact-hue distribution.	Figure 8, printed p. 276

evidence

R26

Red modified by brown2% of Red category; size undisclosedExact count not stated

Red cohort R22; 1.6% of predominantly red diamonds · 2025 publication; dates unstated

Share of predominantly red category; no exact brown-modified-red count disclosed.