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Heart|Natural|GIA

1.51ct D SI1 Heart Natural Diamond

ID • D/SI1 • GIA 7551135021

Certificate GIA 7551135021

Diamond specifications and retailer prices

From $7,470 SGD
$5,843 USD
As of October 31, 2026
Save $6,905 SGD (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $17,086 SGD at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7551135021. Listed at 15 retailers as of October 31, 2026, with a 92% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7551135021
Dimensions7.92 × 6.69 × 4.73 mm
L/W Ratio1.18
Culet sizeNone
Key to symbols
Cloud, Feather, Crystal, Needle
Top View
7.92 mm6.69 mm1.51 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7551135021
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 59.7%

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: $17,086 SGD|Low: $7,470 SGD|High: $17,086 SGD|Avg: $10,469 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 13$7,470 SGD
Retailer 16$7,851 SGD
Retailer 14$8,542 SGD
Retailer 4$8,987 SGD
Retailer 15$9,254 SGD
Retailer 12$9,398 SGD
Retailer 2$9,650 SGD
Retailer 7$10,329 SGD
Retailer 8$10,329 SGD
Retailer 5$10,435 SGD
Retailer 6$10,675 SGD
Retailer 3$10,678 SGD
Retailer 9$11,267 SGD
Retailer 11$12,672 SGD
Retailer 10$14,375 SGD
NZ Jewellers$17,086 SGD

38 data points across 16 retailers

15 retailers$7,470 SGD to $14,375 SGD

A
Cheapest Retailer
-
$7,470 SGD
$5,843 USD
A
Retailer 2
-
$7,851 SGD
$6,141 USD
View
B+
Retailer 3
-
$8,987 SGD
$7,030 USD
View
Retailer 4
-
$9,254 SGD
$7,239 USD
View
Price last confirmed 10 days ago
Retailer 5
-
$9,398 SGD
$7,351 USD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
$9,650 SGD
£5,944 GBP
View
B+
Retailer 7
-
$10,329 SGD
$8,080 USD
View
B+
Retailer 8
-
$10,329 SGD
$8,080 USD
View
B+
Retailer 9
-
$10,435 SGD
$8,162 USD
View
B+
Retailer 10
-
$10,675 SGD
$8,350 USD
View
Retailer 11
-
$10,678 SGD
$8,353 USD
View
Price last confirmed 10 days ago
B+
Retailer 12
-
$11,267 SGD
€8,394 EUR
View
B
Retailer 13
-
$12,672 SGD
ZAR 160,134 ZAR
View
B
Retailer 14
-
$14,375 SGD
£8,854 GBP
View
Most Expensive
NZ Jewellers
617242c2-413d-471a-8e84-634a2b559113 · Oct 21
$17,086 SGD
$13,365 USD
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from $7,470 SGDSave up to $6,905 SGD

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
1.51ct Heart
$7,470 SGD