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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 $389 USD
As of October 30, 2026
Save $740 USD (66%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $1,129 USD at MOH London · As of October 26, 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 26, 2026, with prices from $389 to $1,129, a $740 spread on the same certified stone. MOH London lists it at $1,129. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,129 USD|Low: $389 USD|High: $1,871 USD|Avg: $641 USD|-4.5%
MOH London
Retailer 2
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Retailer 24
October 31, 2026
Retailer 18$389 USD
Retailer 9$398 USD
Retailer 10$400 USD
Retailer 7$431 USD
Retailer 5$448 USD
Retailer 3$464 USD
Retailer 6$464 USD
Retailer 2$497 USD
Retailer 4$502 USD
Retailer 13$527 USD
Retailer 11$540 USD
Retailer 12$540 USD
Retailer 14$540 USD
Retailer 16$560 USD
Retailer 21$586 USD
Retailer 22$594 USD
Retailer 17$596 USD
Retailer 24$598 USD
Retailer 23$640 USD
Retailer 15$710 USD
Retailer 8$716 USD
Retailer 19$734 USD
MOH London$1,129 USD
Retailer 20$1,824 USD

21 data points across 24 retailers

25 retailers$389 USD to $1,129 USD

A
Cheapest Retailer
-
$389 USD
A
Retailer 2
-
$398 USD
View
Final sale: no returns
A
Retailer 3
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$400 USD
View
A
Retailer 4
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$431 USD
View
A
Retailer 5
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$448 USD
HK$3,500 HKD
View
A
Retailer 6
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$464 USD
View
A
Retailer 7
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$464 USD
View
A
Retailer 8
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$497 USD
View
A
Retailer 9
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$502 USD
View
B+
Retailer 10
-
$527 USD
View
B+
Retailer 11
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$540 USD
View
B+
Retailer 12
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$540 USD
View
B+
Retailer 13
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$540 USD
View
B+
Retailer 14
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$560 USD
View
B+
Retailer 15
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$586 USD
£461 GBP
View
B+
Retailer 16
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$594 USD
£467 GBP
View
B+
Retailer 17
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$596 USD
£470 GBP
View
B+
Retailer 18
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$598 USD
View
B+
Retailer 19
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$640 USD
View
B
Retailer 20
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$710 USD
View
B+
Retailer 21
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$716 USD
€682 EUR
View
B+
Retailer 22
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$734 USD
ZAR 11,865 ZAR
View
Retailer 23
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$762 USD
A$1,172 AUD
View
Price last confirmed 27 days ago
Most Expensive
B
MOH London
2072DB740 · Oct 26
$1,129 USD
£889 GBP
View
23 more retailers have this diamond
Prices start from $389 USDSave up to $740 USD

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
$389 USD