Oval|Natural|GIA

1.50ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 6551278598

Certificate GIA 6551278598

Diamond specifications and retailer prices

From $4,749 USD
HK$37,100 HKD
As of October 30, 2026
Save $4,813 USD (50%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $13,252 USD at NZ Jewellers · As of August 30, 2026
View at NZ Jewellers

About this 1.5ct natural oval diamond

This 1.5ct natural oval 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 6551278598. Listed at 18 retailers as of October 29, 2026, with a 101% 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

1.50
Carat
D
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6551278598
Dimensions8.92 × 6.52 × 4.11 mm
L/W Ratio1.37
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
8.92 mm6.52 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551278598
Side View
Table 58.0%CrownGirdlePavilionCulet: NoneDepth 63.0%

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 30
Current: $6,192 USD|Low: $4,749 USD|High: $10,645 USD|Avg: $6,691 USD|-13.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 10$4,749 USD
Retailer 12$5,467 USD
Retailer 2$5,630 USD
Retailer 9$5,646 USD
Retailer 11$5,958 USD
Retailer 8$6,000 USD
Retailer 1$6,192 USD
Retailer 4$6,239 USD
Retailer 3$6,382 USD
Retailer 6$7,042 USD
Retailer 7$7,861 USD
Retailer 5$9,562 USD

35 data points across 12 retailers

18 retailers$4,749 USD to $9,562 USD

A
Cheapest Retailer
-
$4,749 USD
HK$37,100 HKD
Retailer 2
-
$5,467 USD
SGD 7,388 SGD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$5,630 USD
View
A
Retailer 4
-
$5,646 USD
View
A
Retailer 5
-
$5,958 USD
View
Final sale: no returns
A
Retailer 6
-
$6,000 USD
View
Retailer 7
-
$6,128 USD
View
Price last confirmed 22 days ago
A
Retailer 8
-
$6,192 USD
£4,876 GBP
View
Retailer 9
-
$6,382 USD
A$9,818 AUD
View
Price last confirmed 21 days ago
Retailer 10
-
$6,455 USD
View
Price last confirmed 20 days ago
A
Retailer 11
-
$7,042 USD
€6,707 EUR
View
Retailer 12
-
$7,487 USD
View
Price last confirmed 31 days ago
Retailer 13
-
$7,660 USD
View
Price last confirmed 21 days ago
B+
Retailer 14
-
$7,861 USD
ZAR 126,995 ZAR
View
Retailer 15
-
$8,932 USD
View
Price last confirmed 45 days ago
B+
Retailer 16
-
$9,562 USD
£7,529 GBP
View
Retailer 17
-
$11,104 USD
View
Price last confirmed 21 days ago
Most Expensive
NZ Jewellers
5d398fb2-e47e-4d8d-9c9c-99cae6142bd8 · Aug 30
$13,252 USD
View
Price last confirmed 61 days ago
17 more retailers have this diamond
Prices start from $4,749 USDSave up to $4,813 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
1.50ct Oval
$4,749 USD