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Marquise|Natural|GIA

0.78ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2121522758

Certificate GIA 2121522758

Diamond specifications and retailer prices

From $1,303 USD
As of October 31, 2026
Save $650 USD (33%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,953 USD at 77 Diamonds · As of November 1, 2026
View at 77 Diamonds

About this 0.78ct natural marquise diamond

This 0.78ct natural marquise sits in the just-under-one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2121522758. Listed at 2 retailers as of October 31, 2026, with prices from $1,303 to $1,953, a $650 spread on the same certified stone. 77 Diamonds lists it at $1,953. 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

0.78
Carat
I
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishGood
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2121522758
Dimensions8.77 × 5.00 × 3.01 mm
L/W Ratio1.75
Girdle conditionFaceted
Top View
8.77 mm5.00 mm0.78 ctI / SI2
OriginNatural
CutExcellent
PolishGood
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2121522758
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCuletDepth 60.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: $1,953 USD|Low: $1,909 USD|High: $1,962 USD|Avg: $1,944 USD|+2.3%
November 1, 2026
77 Diamonds$1,953 USD

36 data points across 1 retailer

2 retailers$1,303 USD to $1,953 USD

B+
Cheapest Retailer
-
$1,303 USD
Most Expensive
B
77 Diamonds
MQZMN6QDEDS · Nov 1
$1,953 USD
£1,538 GBP
View
1 more retailer has this diamond
Prices start from $1,303 USDSave up to $650 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.

B+
0.78ct Marquise
$1,303 USD