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Emerald|Natural|GIA

0.51ct H SI1 Emerald Natural Diamond

ID • H/SI1 • GIA 2557428154

Certificate GIA 2557428154

Diamond specifications and retailer prices

From $690 NZD
$389 USD
As of October 31, 2026
Save $1,259 NZD (65%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $1,949 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 0.51ct natural emerald diamond

This 0.51ct natural emerald sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557428154. Listed at 25 retailers as of October 31, 2026, with prices from $690 to $1,949, a $1,259 spread on the same certified stone. MOH London lists it at $1,949. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle47.3°
Pavilion angle56.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557428154
Dimensions5.83 × 3.73 × 2.47 mm
L/W Ratio1.56
Girdle conditionPolished
Top View
5.83 mm3.73 mm0.51 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557428154
Side View
Table 69.0%Crown 47.3°Girdle: MED-STKPavilion 56.2°Culet: NDepth 66.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $1,949 NZD|Low: $690 NZD|High: $3,320 NZD|Avg: $1,134 NZD|-7.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
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Retailer 21
Retailer 22
Retailer 23
Retailer 24
November 1, 2026
Retailer 21$690 NZD
Retailer 9$706 NZD
Retailer 10$710 NZD
Retailer 8$765 NZD
Retailer 6$795 NZD
Retailer 4$823 NZD
Retailer 7$823 NZD
Retailer 20$882 NZD
Retailer 5$891 NZD
Retailer 18$951 NZD
Retailer 11$958 NZD
Retailer 12$958 NZD
Retailer 14$958 NZD
Retailer 16$994 NZD
Retailer 2$1,036 NZD
Retailer 13$1,053 NZD
Retailer 17$1,058 NZD
Retailer 3$1,061 NZD
Retailer 24$1,136 NZD
Retailer 15$1,260 NZD
Retailer 19$1,272 NZD
Retailer 22$1,303 NZD
MOH London$1,949 NZD
Retailer 23$3,236 NZD

20 data points across 24 retailers

25 retailers$690 NZD to $1,949 NZD

A
Cheapest Retailer
-
$690 NZD
$389 USD
A
Retailer 2
-
$706 NZD
$398 USD
View
Final sale: no returns
A
Retailer 3
-
$710 NZD
$400 USD
View
A
Retailer 4
-
$765 NZD
$431 USD
View
A
Retailer 5
-
$795 NZD
HK$3,500 HKD
View
A
Retailer 6
-
$823 NZD
$464 USD
View
A
Retailer 7
-
$823 NZD
$464 USD
View
A
Retailer 8
-
$882 NZD
$497 USD
View
A
Retailer 9
-
$891 NZD
$502 USD
View
B+
Retailer 10
-
$951 NZD
$536 USD
View
B+
Retailer 11
-
$958 NZD
$540 USD
View
B+
Retailer 12
-
$958 NZD
$540 USD
View
B+
Retailer 13
-
$958 NZD
$540 USD
View
B+
Retailer 14
-
$994 NZD
$560 USD
View
B+
Retailer 15
-
$1,036 NZD
£460 GBP
View
B+
Retailer 16
-
$1,053 NZD
£467 GBP
View
B+
Retailer 17
-
$1,058 NZD
£470 GBP
View
B+
Retailer 18
-
$1,061 NZD
$598 USD
View
B+
Retailer 19
-
$1,136 NZD
$640 USD
View
B
Retailer 20
-
$1,260 NZD
$710 USD
View
B+
Retailer 21
-
$1,272 NZD
€683 EUR
View
B+
Retailer 22
-
$1,303 NZD
ZAR 11,865 ZAR
View
Retailer 23
-
$1,352 NZD
A$1,172 AUD
View
Price last confirmed 29 days ago
Most Expensive
B
MOH London
2072DB740 · Nov 1
$1,949 NZD
£865 GBP
View
23 more retailers have this diamond
Prices start from $690 NZDSave up to $1,259 NZD

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.

A
0.51ct Emerald
$690 NZD