Tooltos Quartz Crucible Boat | 87x9mm, Gold Silver Copper Smelting and Refining
- 95 in stock
Description
Key Selling Points
- Quartz construction withstands the high temperatures required for smelting gold, silver, copper, aluminum, and brass — quartz has a higher thermal shock resistance than standard ceramic crucibles
- Boat shape (87 x 9mm) provides a long, shallow channel suited for small-quantity metal melting, assay work, and refining operations where a round crucible would be impractical
- Compatible with fuel furnaces, kilns, natural gas furnaces, coke ovens, and coal furnaces — works across the common furnace types used in jewelry and metalworking studios
- Lightweight at approximately 9g — easy to handle with crucible tongs during and after heating
About This Crucible Boat
A crucible boat is a long, narrow, open-channel vessel used for melting or heating small quantities of material in a furnace. The boat shape allows the molten metal to pool along the length of the vessel and makes it easier to pour or transfer the melt compared to a deep round crucible. The 87 x 9mm size is suited for small-batch precious metal work — melting scrap gold or silver for re-casting, refining small quantities of metal, or assay operations where precise small-volume control is needed.
Quartz is the preferred material for precious metal work because it does not react with gold, silver, or copper at melting temperatures and introduces no contamination to the melt. It also handles thermal cycling better than many ceramic materials, though like all quartz labware it should be preheated gradually and avoided from sudden cold contact when hot.
Best For / Not For
| Best For | Not For |
|---|---|
| Small-batch smelting and refining of gold, silver, copper, aluminum, and brass | Large-volume melting — the 87 x 9mm boat size is suited for small quantities only |
| Assay work and precious metal analysis requiring a clean, non-reactive vessel | Sudden temperature changes — always preheat gradually and avoid cold contact when hot |
| Use with gas, fuel, coke, coal, and kiln furnace types | Ferrous metals (iron, steel) at very high temperatures — quartz may react with iron oxides at extreme temperatures |
Technical Specifications
| Material | Quartz |
| Dimensions | 87 x 9mm (3.4 x 0.35 in) |
| Weight | Approx. 9g (0.32 oz) |
| Compatible Metals | Gold, silver, copper, aluminum, brass and non-ferrous alloys |
| Compatible Furnaces | Fuel, kiln, natural gas, coke, and coal furnaces |
Pro Tips
- Preheat the crucible boat at a low furnace setting for several minutes before bringing it to full temperature — gradual heating prevents thermal shock cracking that can occur when cold quartz is exposed to sudden high heat.
- Place the hot crucible boat on a heat-resistant ceramic or refractory brick surface after removal from the furnace — never on a cold metal surface, concrete, or near water.
- Use appropriate crucible tongs sized for the boat dimensions when handling at temperature — the narrow 9mm width requires tongs with a fine grip to hold the boat securely during pouring.
- Inspect the boat for cracks before each use — a cracked quartz vessel can fail during heating and release molten metal unexpectedly.
Frequently Asked Questions
What is the difference between a crucible boat and a round crucible?
A crucible boat is a long, shallow, open-channel vessel suited for small-quantity melting and assay work where the boat shape makes pouring or transferring the melt easier. A round crucible is deeper and better suited for larger volumes. The 87 x 9mm boat is designed for small-batch precious metal work.
Why use quartz instead of ceramic or graphite?
Quartz does not react with gold, silver, or copper at melting temperatures, so it introduces no contamination to the melt. It also has good thermal shock resistance compared to standard ceramic. Graphite crucibles are better suited for very high-temperature work or metals that benefit from a reducing atmosphere.
What if I have questions after receiving the crucible boat?
Contact the Tooltos team at sales@tooltos.com. We respond within 24 hours on business days.
What's Included
- 1 x Quartz crucible boat (87 x 9mm)
Support
Questions about furnace compatibility or order status? Contact the Tooltos team at sales@tooltos.com. We respond within 24 hours on business days.
