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- Brand: Folkmarketgems
- SKU: topaz-23
- Product type: Faceting Rough
Gemstone Specification
| Specification | Details |
|---|---|
Stone Name | Topaz |
Gems Type | Semi-Precious Gemstones |
Color of Gems | Neo Blue, Medium Blue, and Royal Blue |
Clarity | Semi Transparent, Transparent, VS, Si, Eye Clean, and VVS |
Origin | Afghanistan |
Treatments | No |
Birthstones | November |
Category Types | Facet Rough |
Deal Type | Small Bulk Lots / Start Up Deals |
| Specification | Details |
|---|---|
Stone Name | Topaz |
Gems Type | Semi-Precious Gemstones |
Color of Gems | Neo Blue, Medium Blue, and Royal Blue |
Clarity | Semi Transparent, Transparent, VS, Si, Eye Clean, and VVS |
Origin | Afghanistan |
| Specification | Details |
|---|---|
Treatments | No |
Birthstones | November |
Category Types | Facet Rough |
Deal Type | Small Bulk Lots / Start Up Deals |
Product Description
Grab rare electric Swiss Blue Topaz for cutting or collections
Details of Raw Topaz Deals:
- Stone: Topaz (Al₂SiO₄(F,OH)₂)
- Total Weight: 500 grams
- Deals Available: 100 grams , 200 grams
- Sizes: 1 to grams to 4 grams per piece
- Colors: Swiss Blue Topaz
- Clarity: VVS, Eye clean
- Treatment: Heated
- Origin: Brazil
Technical Properties for Faceting:
- Hardness: 8 on Mohs scale
- Specific Gravity: 3.49-3.57
- Refractive Index: 1.609-1.643 (biaxial positive)
- Cleavage: Perfect basal cleavage {001}
- Fracture: Subconchoidal to uneven
Lapidary & Faceting Guidelines
Critical Handling Tips:
- Cleavage Awareness: Topaz has perfect basal cleavage - NEVER apply pressure perpendicular to the crystal's length
- Temperature Sensitivity: Avoid sudden temperature changes; heat slowly and cool gradually
- Orientation: Always orient the table perpendicular to the c-axis to minimize cleavage risk
- Pressure Control: Use light, consistent pressure when dopping and cutting
Cutting Recommendations:
- Preferred Cuts: Oval, cushion, emerald cut work best with topaz's crystal structure
- Avoid: Sharp corners or thin pavilions that stress cleavage planes
- Angles: Crown angles 40-43°, pavilion angles 41-43° for optimal brilliance
- Polish Direction: Always polish away from cleavage planes
Equipment & Materials:
- Saw: Diamond blade with light pressure
- Grinding: 220-400 grit for pre-forming
- Polishing: Cerium oxide or diamond paste on tin lap
- Dopping: Use low-temperature wax, avoid excessive heat
Frequently Asked Questions for Lapidaries
Q: Why does my topaz sometimes chip during cutting? A: You're likely cutting against the cleavage plane. Always check crystal orientation before starting.
Q: What's the best way to orient rough topaz? A: Look for the elongated crystal faces - the table should be cut perpendicular to this direction.
Q: Can I heat-treat these further? A: These are already heat-treated. Further heating may cause color loss or cracking.
Q: What causes the milky areas in some stones? A: Fluid inclusions or micro-fractures. These areas should be avoided or worked around.
Q: Best polishing technique for topaz? A: Use cerium oxide on tin lap with light pressure and consistent speed.
Premium Swiss Blue Topaz Faceting Rough - Professional Grade
- Exceptional Quality: Hand-selected VVS to eye-clean clarity specimens
- Vibrant Color: Electric Swiss Blue with excellent saturation and brilliance
- Perfect for Faceting: 1-4 gram pieces ideal for standard gem cuts
- Professional Grade: Heat-treated Brazilian material with consistent quality
- Lapidary Ready: Pre-sorted for optimal cutting potential
- Bulk Savings: Available in 100g and 200g wholesale quantities
- Collector Quality: Museum-grade specimens suitable for serious collectors
- Guaranteed Results: Each piece carefully inspected for faceting viability
- Expert Sourced: Direct from Brazilian mines with full provenance
- Investment Grade: Rare electric blue color commands premium prices