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Gem Silica Rough
Locality: Ray Mine, Pinal County, Arizona
Gem Silica is the rarest and most desirable form of Chrysocolla. This material cuts and polishes easily, but coarse wheels may cause fracturing. This Gem Silica has fabulous color and will produce valuable gems.

Chrysocolla is a secondary copper mineral with a blue-green color, that some people mistake for turquoise. The main difference is turquoise contains phosphorus and chrysocolla does not.

Gem Silica takes a great polish with tin oxide or diamond, and may be followed up with green rouge (Zam is a brand name for green rouge). Mohs hardness 5.0 to 6.0.


 Gem Silica Rough #2 Grade - $1.00/gram (~$454/pound)
Locality: Ray Mine, Pinal County, Arizona

This Gem Silica may be referred to as #2, but it will cut really great stones. The yield won't be as good as the other rough we have and the resulting stones may be a little smaller, but you can't beat the price! Some pieces may have a little pocket of drusy.


Sample of #2 Grade Gem Silica Rough from Ray Mine, Arizona
Item Number
Description
Weight
Price
Gem Silica#1
Triangular shape measures approximately 31.8 x 18.1 x 9.1mm thick.
7.80 grams
$7.80
Gem Silica#2
Two piece parcel of triangular shapes measures approximately 27.3 x 16.0 x 8.0 to 3.9mm thick, and 23.7 x 12.0 x 9.2mm thick.
14.42 grams
$14.42
Gem Silica#3
Two piece parcel of triangular shapes measures approximately 29.8 x 12.5 x 10.2 to 3.7mm thick, and 24.5 x 13.8 x 6.3 to 4.5mm thick.
7.03 grams
$7.03
Gem Silica#4
Two piece parcel measures approximately 19.7 x 15.6 x 8.5mm thick, and 17.5 x 16.1 x 9.0mm at a peak. SOLD
8.77 grams
$8.77
Gem Silica#5
Triangular shape measures approximately 35.5 x 25.4 x 8.5mm thick.
7.36 grams
$7.36
Gem Silica#6
Three piece parcel of triangular shapes measures approximately 23.9 x 14.8 x 7.2mm thick, 23.0 x 17.2 x 8.0mm at the thickest point, and 26.0 x 9.4 x 5.9 x 7.6 to 5.3mm thick.
8.68 grams
$8.68
Gem Silica#7
Triangular shape measures approximately 30.3 x 27.5 x 9.5mm thick.
10.68 grams
$10.68
Gem Silica#8
Three piece parcel measures approximately 15mm x 13.8 x 9.2mm thick and two triangular pieces at 27.1 x 14.0 x 13.3 at a peak and 21.3 x 16.3 x 5.7 to 4.5mm thick.
11.41 grams
$11.41
Gem Silica#9
Three piece parcel of triangular shapes measures approximately 21.5 x 19.0 x 7.4mm thick, 19.0 x 12.8 x 7.8mm thick and 14.1 x 13.3 x 11.7mm thick. SOLD
10.59 grams
$10.59
Gem Silica#10
Three piece parcel of triangular shapes measures approximately 19.2 x 15.1 x 9.9mm thick at a peak, 17.5 x 111.1 x 8.7mm at the thickest place and 15.4 x 9.7 x 9.4mm thick.
7.85 grams
$7.85

 Gem Silica Rough #1 Grade - $1.75/gram (~$794/pound)
Locality: Ray Mine, Pinal County, Arizona

This Gem Silica is #1 Grade, which means it will generally cut larger stones and produce a higher yield. It may not be quite as good of a value as the #2 Grade, but may work out better for amateur cutters. Some pieces may have a little pocket of drusy.


Sample of #1 Grade Gem Silica Rough from Ray Mine, Arizona
Item Number
Description
Weight
Price
Gem Silica#11
Triangular shape measures approximately 34.9 x 33.0 x 8.3mm thick. SOLD
13.79 grams
$24.13
Gem Silica#12
Measures approximately 30.4 x 19.4 x 17.6 to 9.6mm thick.
14.42 grams
$25.24
Gem Silica#13
Two piece parcel measures approximately 18.3 x 17.6 to 11.8mm x 9.3mm thick, and 24.2 x 9.5 x 11.8mm at a ridge.
10.24 grams
$17.92
Gem Silica#14
Triangular shape measures approximately 28.1 x 23.5 x 9.2mm thick.
8.60 grams
$15.05
Gem Silica#15
Two piece parcel measures approximately 18.6 x 17.2 x 11.1mm at the thickest place, and 24.0 x 13.1 x 8.4mm at the thickest place.
9.10 grams
$15.93
Gem Silica#16
Two piece parcel of triangular shapes measures approximately 26.1 x 17.6 x 11.5 to 9.0mm thick, and 18.6 x 11.3 x 7.5mm thick. SOLD
8.41 grams
$14.72
Gem Silica#17
Two piece parcel measures approximately 17.1 x 13.7 x 11.6mm thick, and a triangular piece with drusy at 17.7 x 14.2 x 8.5mm at the thickest place.
8.53 grams
$14.93
Gem Silica#18
Two piece parcel of triangular shapes measures approximately 25.6 x 16.5 x 8.4 to 4.0mm thick, and 20.2 x 16.4 x 9.0mm thick.
8.75 grams
$15.31
Gem Silica#19
Three piece parcel measures approximately 17.5 x 12.5 x 10.7mm thick at a ridge, 18.5 x 9.3 x 8.3mm thick, and a triangular shape piece at 21.8 x 8.0 x 8.0mm thick. SOLD
9.39 grams
$16.43
Gem Silica#20
Measures approximately 16.9 x 7.9 x 4.8mm thick at a ridge.
4.41 grams
$7.72

 Drusy Gem Silica Rough - $3.50/gram (~$1588/pound)
Locality: Ray Mine, Pinal County, Arizona

This Gem Silica has drusy quartz! It is the most sought after form of Gem Silica. This Gem Silica will cut gorgeous blue stones with sparkling drusy!


Sample Drusy Gem Silica Rough from Ray Mine, Arizona
Item Number
Description
Weight
Price
Gem Silica#21
Measures approximately 18.2 x 13.3 x 9.1 to 7.0mm thick.
3.57 grams
$12.50
Gem Silica#22
Triangular shape measures approximately 19.3 x 12.0 x 12.0mm thick. SOLD
3.94 grams
$13.79
Gem Silica#23
Triangular shape measures approximately 20.6 x 16.4 x 8.5mm thick. SOLD
3.72 grams
$13.02
Gem Silica#24
Measures approximately 23.3 x 21.0 x 7.4 to 5.4mm thick.
4.41 grams
$15.44
Gem Silica#25
Measures approximately 22.8 x 19.3 x 11.9 to 6.2mm thick.
7.13 grams
$24.96
Gem Silica#26
Measures approximately 21.2 x 10.7 x 9.6mm thick. SOLD
4.03 grams
$14.11
Gem Silica#27
Triangular shape measures approximately 30.5 x 26.1 x 9.9 to 4.8mm thick.
9.59 grams
$33.57
Gem Silica#28
Triangular shape measures approximately 20.5 x 15.8 x 10.8mm thick.
6.27 grams
$21.95
Gem Silica#29
Triangular shape measures approximately 22.2 x 16.4 x 14.3 to 8.5mm thick.
4.85 grams
$16.98
Gem Silica#30
Measures approximately 22.3 x 15.6 x 9.3 to 7.6mm thick.
6.51 grams
$22.79

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