Grandidierite

Borosilicate Group

Key Properties

Property Value
Mohs Hardness 7.5 (7.5)
Typical Size 0.1-5 carats (commercial: 0.25-2 carats; faceted stones over 3 carats are rare)
Typical Price Range $5,000-30,000+ per carat (commercial: $10,000-20,000; faceted stones extremely rare)
Rarity Level Singular Occurrence
Availability Level Museum Grade Rarity
Availability Driver Limited Deposits
Investment Appropriateness Speculative Collector Gems

Pricing

Typical Price
$800.00
per carat
Listing Price
$32.13
per carat
Sold Price
$8.96
per carat
My Price
N/A
per carat

Price Calculator

Estimate Type Total Value Price per Carat
Typical Cost - -
Likely Listed Cost - -
Likely Sold Cost - -
My Price Cost - -
BULLISH
78.75

Score Components

Geo rarity
100
Mkt availability
100
Invest Appr
50
hardness
45
price
85

Buy This Gem

Gem Rock Auctions Best In Gems

Detailed Descriptions

Rarity Description: A very rare blue-green mineral with limited localities; collector-grade gems are scarce.

Availability Description: Sporadic offerings to collectors and museums; rarely seen in retail jewelry markets.

Investment Description: Rare blue-green gem with growing recognition; limited faceted material; strong appreciation in recent years; small but expanding collector market.

Seller Prices

Seller Faceted Price Rough Price
ucgems $2081.06/ct -
crysta1gems $1597.87/ct -
waranyugemsmart $29.66/ct -
preciouscarats $20.37/ct -
kkljewelsland $7.75/ct -
haniyagemsc $7.69/ct -
uniqueemerald $6.02/ct -
siamesegems $4.28/ct -
facetsprecision $3.42/ct -
lapisgems $2.91/ct -
novajewels $2.23/ct -
fakhr $2.23/ct -
fawadalikn007 $0.62/ct -
$0.52/ct -

Price History (Last 3 Years)

Loading price data...

Origin Variants

Origin Rarity Price Multiplier
Madagascar Extremely Rare x3.00

Color Variants

Variant Color Rarity Price Multiplier
Blue-Green Grandidierite Blue-Green Very Rare x1.00
Bluish Green Grandidierite Bluish Green Very Rare x1.00
Green Grandidierite Green Very Rare x1.00

Price Levels of Origin and Color Variants on MC

Origin Colour Clarity Price Per Carat # Listings Avg Weight
Madagascar medium green-blue Slightly to Moderately included $4725.00/ct 1 1.20 ct
Madagascar medium light green blue or blue green Eye clean to Slightly included $3721.01/ct 1 1.19 ct
Madagascar very light very strongly greenish blue Eye clean $2715.70/ct 1 1.72 ct
Madagascar medium dark green blue or blue green Slightly included $2160.19/ct 1 3.19 ct
Madagascar medium light green blue or blue green Eye clean $1800.00/ct 1 0.31 ct
Madagascar medium green-blue Eye clean $1600.00/ct 1 0.59 ct
Madagascar medium light green-blue Eye clean to Slightly included $1592.86/ct 2 1.05 ct
Madagascar medium green-blue Eye clean to Slightly included $1539.53/ct 1 0.86 ct
Madagascar very light green-blue Eye clean $1500.00/ct 1 0.25 ct
Madagascar medium green blue or blue green Eye clean to Slightly included $1500.00/ct 1 0.16 ct
Madagascar light very strongly greenish blue Slightly to Moderately included $1500.00/ct 1 0.45 ct
Madagascar medium green-blue Slightly included $1440.74/ct 1 0.54 ct
Madagascar very light greenish blue Moderately included $1440.36/ct 1 2.23 ct
Madagascar medium light green-blue Eye clean $1125.68/ct 11 0.58 ct
- - Eye clean $735.29/ct 2 0.26 ct
Madagascar medium light green-blue Slightly included $720.45/ct 1 0.44 ct
Madagascar very light green blue or blue green Slightly included $720.00/ct 1 0.45 ct
Madagascar medium dark green blue or blue green Moderately included $720.00/ct 1 0.57 ct
Madagascar very light green blue or blue green Eye clean $683.69/ct 13 0.33 ct
Madagascar medium dark green blue or blue green Eye clean $663.16/ct 1 0.19 ct
Madagascar very light green blue or blue green Eye clean to Slightly included $629.63/ct 1 0.27 ct

Current Listings

Please sign in to view current listings.

Other gems in the Borosilicate Group:

My Holdings of this gem

You do not have any holdings of this gem type.