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Emerald|Natural|GIA

20.21ct J VS1 Emerald Natural Diamond

VG • J/VS1 • GIA 5211914064

Certificate GIA 5211914064

Diamond specifications and retailer prices

From $824,065 AUD
$578,860 USD
As of October 28, 2026
Save $157,390 AUD (16%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $981,455 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 20.21ct natural emerald diamond

This 20.21ct natural emerald sits in the over five carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5211914064. Listed at 3 retailers as of October 28, 2026, with prices from $824,065 to $981,455, a $157,390 spread on the same certified stone. Blue Nile lists it at $981,455. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

20.21
Carat
J
Colour
VS1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 5211914064
Dimensions17.18 × 13.15 × 8.90 mm
L/W Ratio1.31
Top View
17.18 mm13.15 mm20.21 ctJ / VS1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5211914064
Side View
Table 72.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 67.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $981,455 AUD|Low: $824,065 AUD|High: $981,455 AUD|Avg: $871,441 AUD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 18, 2026
Retailer 2$824,065 AUD
Retailer 3$834,331 AUD
Retailer 4$841,214 AUD
Retailer 5$879,736 AUD
Blue Nile$981,455 AUD

4 data points across 5 retailers

3 retailers$824,065 AUD to $981,455 AUD

B
Cheapest Retailer
-
$824,065 AUD
$578,860 USD
B
Retailer 2
-
$841,214 AUD
$590,906 USD
View
Most Expensive
C
Blue Nile
17137127 · Oct 31
$981,455 AUD
$689,418 USD
View
2 more retailers have this diamond
Prices start from $824,065 AUDSave up to $157,390 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
20.21ct Emerald
$824,065 AUD