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Heart|Natural|GIA

1.59ct G SI1 Heart Natural Diamond

VG • G/SI1 • GIA 1146798237

Certificate GIA 1146798237

Diamond specifications and retailer prices

From £5,539 GBP
$7,433 USD
As of November 2, 2026
Save £1,730 GBP (24%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £7,269 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 1.59ct natural heart diamond

This 1.59ct natural heart sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1146798237. Listed at 3 retailers as of November 2, 2026, with prices from £5,539 to £7,269, a £1,730 spread on the same certified stone. 77 Diamonds lists it at £7,269. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.59
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishGood
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1146798237
Dimensions7.90 × 8.97 × 3.72 mm
L/W Ratio1.14
Top View
7.90 mm8.97 mm1.59 ctG / SI1
OriginNatural
CutVery Good
PolishGood
SymmetryGood
FluorescenceFaint
CertificateGIA 1146798237
Side View
Table 57.0%CrownGirdlePavilionCuletDepth 41.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £7,269 GBP|Low: £5,464 GBP|High: £7,331 GBP|Avg: £6,399 GBP|+0.7%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2£5,539 GBP
77 Diamonds£7,269 GBP

31 data points across 2 retailers

3 retailers£5,539 GBP to £7,269 GBP

B
Cheapest Retailer
-
£5,539 GBP
$7,433 USD
B
Retailer 2
-
£6,001 GBP
$8,053 USD
View
Most Expensive
C
77 Diamonds
HSZXJXZZMYA · Nov 2
£7,269 GBP
View
2 more retailers have this diamond
Prices start from £5,539 GBPSave up to £1,730 GBP

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
1.59ct Heart
£5,539 GBP