One Kg Facet Grade Rough Prasiolite for Cutting - Green Amethsyt Bulk Parcel

1000 grams / 1 kilo gram prasiolite rough stones for faceting. The stones have very nice clarity and are of big sizes. It gives you opportunity to cut them into a desired large faceted stones which can be set as a center piece for any type of jewelry such as bracelet, necklaces, earrings, rings.

Details of Deal

• Stone Name: Prasiolite (Also Popular as Green Amethyst or Green Quartz)
• Total Weight: 1000 Grams
• Sizes: 5 to 20 grams more or less per piece
• Clarity: VS, VVS, Eye Clean
• Treatment: heated
• Origin: Brazil

Technical Analysis for Prasiolite Rough Lot

FACTORS FOR CUTTING OF STONES

Clarity & Transparency: This lot has excellent optical clarity with minimal inclusions visible. Most stones in the lot are with gem-grade transparency suitable for brilliant cuts.

Color Distribution: The lot has even pale green saturation throughout the pieces. No obvious color zoning or dead spots are found in this lot that would limit cutting options.

Crystal Structure: Some stones are well-formed quartz crystals and mostly will be irregular shapes. 

Size Range: The stones will give good sizes ranging from 5-20mm pieces, allowing for multiple carat weights and matched sets.

Material Quality: The clean fracture surfaces indicate good structural integrity without internal stress fractures.

CHALLENGING FACTORS

Surface Condition: Some pieces show weathering/etching that may indicate deeper flaws requiring more material removal.

Inclusion Patterns: Few pieces can have internal veiling that could limit transparency in finished stones.

Shape Irregularity: Some stones may lack clear crystallographic orientation

CUTTING GUIDELINES & PRO TIPS

Orientation Strategy: Always orient table perpendicular to C-axis for maximum color depth. Use polariscope to identify optical axis.

Heat Management: Keep cutting temperatures below 300°F. Prasiolite can revert to colorless quartz with excessive heat.

Preforming: Remove all surface weathering first. What looks like surface etching often goes deeper than expected.

Inclusion Handling: Plan cuts to either completely avoid or strategically place small inclusions near pavilion where they're less visible.

Yield Optimization: Expect 45-65% yield.

Pro Cutting Sequence: Rough shape → heat check → fine preform → faceting. Always test a small piece first if color stability is questionable

5 Key FAQs for Rough Stone Buyers / Lapidary Artists

1. What's the hardness and workability? 

Prasiolite rates 7 on Mohs scale. It can be cut easily with standard diamond wheels, and takes an excellent polish. No special handling required.

2. Will the color fade or change? 

Natural prasiolite is generally stable, but avoid excessive heat during cutting as some green amethyst can revert to clear quartz above 400°F.

3. What yield can I expect? 

Based on the clarity visible, expect 40-60% yield depending on your cutting style and inclusion avoidance.

4. Best cutting orientations? 

Cut perpendicular to the C-axis for best color saturation. The natural crystal faces can guide optimal orientation.

5. What finished sizes are possible? These pieces could yield stones ranging from 2-15 carats, with several suitable for matched pairs or suites.