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$115.00
Item Number
Gemstone
Danburite
Origin
La Aurora mine, Charcas, San Luis Potosí, Mexico
Weight (ct)
4.37 ct
Dimensions (mm)
16.3 x 9.5 x 7.3
Calibrated Size
No
Type of Cut
Custom Designed LOZENGE
Cutter
Faceted by Ravenstein Gem Co.
Color
Slight Pink Tint
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Treatment
None
Tone / Saturation
Notes

Amazing scintillation and fire due to perfect cutting and very high refractive index and light dispersion.

3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$26.32
$137.00
Item Number
Gemstone
Danburite
Origin
La Aurora mine, Charcas, San Luis Potosí, Mexico
Weight (ct)
5.15 ct
Dimensions (mm)
13.3 x 8.4 x 7.9
Calibrated Size
No
Type of Cut
Custom Designed Shield
Cutter
Faceted by Ravenstein Gem Co.
Color
Slight Pink Tint
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Treatment
None
Tone / Saturation
Notes

Amazing scintillation and fire due to perfect cutting and very high refractive index and light dispersion.

3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$26.60
$164.00
Item Number
Gemstone
Natural Unheated Parti Sapphire
Origin
Kenya
Weight (ct)
0.52 ct
Dimensions (mm)
5.1 x 4.7 x 3.4
Calibrated Size
No
Type of Cut
Modified CUSHION
Cutter
Faceted by Ravenstein Gem Co.
Color
Green Yellowish
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Treatment
None
Tone / Saturation
3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$315.38
Item Number
Gemstone
Natural Unheated Parti Sapphire
Origin
Kenya
Weight (ct)
1.48 ct
Dimensions (mm)
9.7 x 6.0 x 4.2
Calibrated Size
No
Type of Cut
Custom Designed PEAR
Cutter
Faceted by Ravenstein Gem Co.
Color
Blue-Green-Teal
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Treatment
None
Tone / Saturation
3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$246.62
Item Number
Gemstone
Natural Unheated Parti Sapphire
Origin
Kenya
Weight (ct)
1.13 ct
Dimensions (mm)
6.8 x 5.2 x 3.6
Calibrated Size
No
Type of Cut
Half Moon Brilliant
Cutter
Faceted by Ravenstein Gem Co.
Color
Green Yellow Bluish
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Treatment
None
Tone / Saturation
3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$331.86
$450.00
Item Number
Gemstone
Natural Unheated Parti Sapphire
Origin
Kenya
Weight (ct)
1.65 ct
Dimensions (mm)
10.1 x 6.5 x 4.1
Calibrated Size
No
Type of Cut
Custom Designed PEAR
Cutter
Faceted by Ravenstein Gem Co.
Color
Blue-Green
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Clarity
SI1 - thin needle inclusions
Treatment
None
Tone / Saturation
3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$272.73
$545.00
Item Number
Gemstone
Natural Unheated Parti Sapphire
Origin
Kenya
Weight (ct)
1.85 ct
Dimensions (mm)
9.8 x 7.0 x 4.8
Calibrated Size
No
Type of Cut
Custom Designed Shield
Cutter
Faceted by Ravenstein Gem Co.
Color
Blue-Green with Unique Schiller
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Clarity
Flawless with Unique Strong Schiller
Treatment
None
Tone / Saturation
3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$294.59
$200.00
Item Number
Gemstone
Natural Untreated Silver-Bluish Topaz
Origin
Nigeria, Africa
Weight (ct)
10.0 ct
Dimensions (mm)
13.1 mm Diameter x 9.1 mm
Calibrated Size
No
Type of Cut
Custom Designed ROUND
Cutter
Faceted by Ravenstein Gem Co.
Color
Silver-Bluish
Clarity Scale
FVVS1VVS2VS1VS2SI1SI2P1P2
Treatment
None
Tone / Saturation
3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$20.00
Item Number
Gemstone
Natural Untreated St. Anne Blue Topaz
Origin
Saint Anne Mine, Rhodesia / Zimbabwe
Weight (ct)
125.90 ct
Dimensions (mm)
30.5 x 28 x 22
Color
Rich Sky Blue
Clarity
Facet / cabochon / top collector grade
Treatment
None
3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$3.18
Item Number
Gemstone
Natural Untreated St. Anne Blue Topaz
Origin
Saint Anne Mine, Rhodesia / Zimbabwe
Weight (ct)
150.80 ct
Dimensions (mm)
40 x 23.9 x 22
Color
Rich Sky Blue
Clarity
Transparent, semi facet / cabochon / top collector grade
Treatment
None
Notes

The St.Anne mine in Zimbabwe was closed 2 years ago.

3D View

* 1.0 Ct = 0.2 Gr ** Images Were Taken Under Open Daylight (6,500K), For Color Change Gems Additionally Under Iridescent Light Source (2700K)
Price per Carat
$2.98

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When:
September 3 - 6, 2026

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