Shop

20 available Gems

$135.00
Item Number
Gemstone
Colombianite
Origin
Colombia
Weight (ct)
4.25 ct
Dimensions (mm)
10.2/10.2 x 8.3/7.8 x 6.3/6.4
Calibrated Size
No
Type of Cut
Modified MARQUISE
Cutter
Faceted by Ravenstein Gem Co.
Color
Walnut-Mahogany
Clarity
Transparent
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
$31.76
$150.00
Item Number
Gemstone
Colombianite
Origin
Colombia
Weight (ct)
4.70 ct
Dimensions (mm)
8.7/8.9 x 8.6/8.9 x 6.6/6.6
Calibrated Size
No
Type of Cut
Custom Designed HEXAGON
Cutter
Faceted by Ravenstein Gem Co.
Color
Walnut-Mahogany
Clarity
Transparent
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
$31.91
$150.00
Item Number
Gemstone
Colombianite
Origin
Colombia
Weight (ct)
4.86 ct
Dimensions (mm)
9.5/9.4 x 7.6/7.6 x 6.6/6.8
Calibrated Size
No
Type of Cut
Custom Designed Octagon
Cutter
Faceted by Ravenstein Gem Co.
Color
Walnut-Mahogany
Clarity
Transparent
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
$30.86
$460.00
Item Number
Gemstone
Demantoid Garnet
Origin
Ural, Russia
Weight (ct)
0.68 ct
Dimensions (mm)
4.3/4.2 mm Diameter x 2.6/2.6
Calibrated Size
Yes
Type of Cut
Standard Round Brilliant
Cutter
cut in Russia
Color
Vivid Green with Slight Yellowish Overtone
Clarity
Transparent with some horsetail 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
$676.47
$180.00
Item Number
Gemstone
Dichroic Oregon Sunstone
Origin
PANA Mine, Southern Oregon, USA
Weight (ct)
4.30 ct
Dimensions (mm)
16.3 x 9.1 x 6.2
Calibrated Size
No
Type of Cut
Custom Designed PEAR
Cutter
Faceted by Ravenstein Gem Co.
Color
Pastel Gold Green-Cinnamon-Peach
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
$41.86
$220.00
Item Number
Gemstone
Malkhan Tourmaline Rubellite
Origin
Malkhan, Russia
Weight (ct)
1.04 ct
Dimensions (mm)
7.0 x 5.5 x 3.8
Calibrated Size
No
Type of Cut
Radiant OCTAGON
Cutter
Faceted by Ravenstein Gem Co.
Color
Pink-Lavender
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
$211.54
Item Number
Gemstone
Malkhan Tourmaline Rubellite
Origin
Malkhan, Russia
Weight (ct)
1.64 ct
Dimensions (mm)
8.1 x 7.8 x 5.1
Calibrated Size
No
Type of Cut
Modified Radiant TRILLION
Cutter
Faceted by Ravenstein Gem Co.
Color
Lavender-Pink
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
$189.02
Item Number
Gemstone
Oregon Sunstone bead
Origin
PANA Mine, Southern Oregon, USA
Weight (ct)
1.44 ct
Dimensions (mm)
6 mm Diameter
Calibrated Size
No
Type of Cut
Faceted Sphere / Bead (undrilled)
Cutter
Custom work-Sri Lanka
Color
Green-Gold
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
$44.44
Item Number
Gemstone
Oregon Sunstone bead
Origin
PANA Mine, Southern Oregon, USA
Weight (ct)
1.46 ct
Dimensions (mm)
6 mm Diameter
Calibrated Size
No
Type of Cut
Faceted Sphere / Bead (undrilled)
Cutter
Custom work-Sri Lanka
Color
Green-Pinkish
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
$47.95
Item Number
Gemstone
Oregon Sunstone bead
Origin
PANA Mine, Southern Oregon, USA
Weight (ct)
2.25 ct
Dimensions (mm)
7 mm Diameter
Calibrated Size
No
Type of Cut
Faceted Sphere / Bead (undrilled)
Cutter
Custom work-Sri Lanka
Color
Green-Pink with Touch of Copper 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
$40.00

Discover a gem as unique as you are.

Step into a world of rare beauty

Ravenstein Gem Co. LLC 2026 ยฉ
Made By a Peanut
JOGS TUCSON GEM SHOW
Where:
Tucson Expo Center, Booth #E324
When:
September 3 - 6, 2026

Find more details here.