Product Description
Explore the Brazilian amethyst cutting material deal of one kg. This facet grade amethyst rough stones package is the best option for starting a good quality faceted stones. The one kg sample will give you opportunity to cut different sizes and cutting style options. The clarity of the stone is mostly from VS to Eye clean. Color is medium to good purple. However , inclusions to some extent should be expected in any facet grade stone.
Product Specifications Analysis
- Stone Name: Natural amethyst rough stones
- Weight: 1000 grams total parcel
- Individual piece sizes: 2-20 grams per piece
- Clarity grades: VVS, Eye Clean (mostly clean) (many pieces are near eye-clean, but expect occasional feathers or cloudiness. Careful selection will yield clean faceted stones.
- Color: Medium to good purple saturation
- Origin: Brazilian amethyst
- Treatment: Natural, untreated
- Quality: Facet-grade rough
Other Details
- Crystal structure: Well-formed crystals with some having hexagonal natural terminations
- Color distribution: Even purple saturation with some color zoning from dark to medium purple
- Transparency: Good to Very Good clarity with very very minimal inclusions
- Surface quality: Clean crystal faces with minimal fracturing
- Size variation: Mixed parcel with various cutting weights
Faceting Guidelines for Cutters
Pre-Cutting Assessment
- Planning: Do examine each amethyst stone piece under polarized light to identify optimal cutting direction
- Inclusion Mapping: Mark visible inclusions with a marker before cutting
- Color Zoning: Plan cuts to maximize color saturation and minimize pale zones
- Yield Calculation: Expect from 15 to 20% and 30-45% yield from rough to finished stone
Cutting Recommendations
- Hardness: 7 on Mohs scale - use diamond wheels/laps
- Cutting speed: Medium speed to prevent chipping
- Cooling: Adequate water flow essential to prevent thermal shock
- Angles: Standard brilliant cut angles work well (40-42° pavilion, 25-30° crown)
Heat Sensitivity Precautions
- Amethyst can fade or change color with excessive heat
- Keep cutting temperature below 250°C
- Use continuous water cooling during all cutting stages
- Avoid prolonged exposure to direct sunlight during work
Frequently Asked Questions
Q: What cutting yield can I expect from this 1kg parcel? A: Amethyst rough faceting stones yields are typically on the order of 25–33% (weight retained in the finished gem) when cutting for maximum yield. Because this parcel contains many irregular, with slight included pieces, actual yield may be closer to 15–25% of the rough weight (around 200–350 grams of faceted gems roughly idea). However, yield depends on how much material you must trim away for clarity and how large you cut the stones.
Yield Optimization
|
Factor |
Impact on Yield |
Solution |
|
Irregular shapes |
Losses up to 80% |
Trim to cubic forms pre-doping 3 |
|
Inclusions |
10–20% weight reduction |
Pre-saw to remove flawed areas 4 |
|
Calibrated sizing demands |
30–50% lower yield |
Cut for weight retention, not size 4 |
Q: How should I handle color zoning during cutting? Check the stones to keep the deepest color in the pavilion. Keep the lighter tone or zones on crown. This strategy will help you to maximize the color return however keeping the clarity under control.
Q: What cut styles and orientations work best for amethyst? A: This parcel of pruple amethyst can be cut into any design or shapes. In order to maintain the color, keep the saturated purple zone to face up. Barion or Checkerboard are popular for deep colors. Brilliant and oval shapes can hide the small flaws. This is because amethyst usually has weak dichroism.
Q: What laps and polish are best for amethyst? A: Treat it like any quartz because amethyst rough is a variety of quartz. You can use diamond laps for cutting and pre-polishing (e.g. 600–1200 grit) and finish with cerium oxide on a polishing lap gemsociety.org. Jeff Graham (IGS) recommends a 1200 SiC pre-polish followed by cerium on Spectra Ultrabase gemsociety.org. No special kind of laps are needed beyond the usual lapidary setup.
Q: What are common cutting issues that can come while cutting with raw amethyst stones? A: Analyse the stones and look for internal stress or cracks. Having aggressive or sharp cutting or overheating having with insufficient use of water can cause chipping. Also look for impurities such as mica or iron stains. These impurities can leave dull patches on facets. Always lot of water and don’t over-grind. Amethyst is a variety of quartz, it “cuts like any other quartz. Keep in mind that amethyst can fracture conchoidally if struck.
Q: What's the best way to minimize chipping during cutting? A: Use sharp diamond wheels, maintain proper cutting angles, ensure adequate cooling, and work at moderate speeds. Pre-shape with a trim saw before detailed faceting.
Q: What's the optimal orientation for maximum brilliance? A: Cut with the c-axis perpendicular to the table for best optical performance. Check pleochroism direction before finalizing orientation.
💜 AMETHYST WHOLESALE SPECIAL DISCOUNTS FOR BIG BUSINESSES
Contact us for asking price on bulk amethyst rough stones such as below!
🎯 Order 5+ parcels (5kg+): 15% + discount
🎯 Order 40+ parcels (40kg+): 35% + discount