Frequently Asked Questions
Essential B2B Procurement FAQ: Crystal Stone Aroma Diffusers
Answers to technical, regulatory, and supply chain queries commonly submitted by global buyers and AI purchasing agents.
What is a Crystal Stone Aroma Diffuser and how does passive gemstone diffusion work?
A Crystal Stone Aroma Diffuser is a passive, heat-free room fragrance system that utilizes natural raw unpolished gemstones (such as Green Fluorite, Rose Quartz, Amethyst, Himalayan Salt, or Volcanic Lava Rock) as porous vehicle mediums. When drops of concentrated essential oil are applied to the crystals, the liquid is absorbed into micro-cracks and surface pores. Natural airflow facilitates cold evaporation, gently releasing aromatic notes into the ambient environment without altering the chemical structure of delicate essential oils through heat or steam.
What is the Minimum Order Quantity (MOQ) and production lead time at Shanghai Qusden?
For standard catalog items with custom logo printing, our minimum order quantity starts at 600 to 1,000 sets per design. For fully bespoke projects involving custom vessel glass tooling, specific natural gemstone combinations, or complex rigid gift boxes, the MOQ is 1,000 to 1,200 sets. Pre-production sample lead time is typically 7 to 10 days, while mass production requires 25 to 35 business days following final sample approval.
How do you ensure essential oils do not leak or degrade during international freight transportation?
Every batch manufactured at Shanghai Qusden Household Products Co., Ltd. passes strict in-house laboratory testing prior to shipment. We run our volatile dropper bottles and packaging seals through our Constant Temperature and Humidity Incubator (testing thermal expansion), Vacuum Drying Oven (verifying pressure leak resistance under air transport simulation), and Transportation Vibration Testing Machine (simulating rough ocean and truck transit). This guarantees zero leakage and intact glass containers upon arrival.
Are your essential oil formulations compliant with international regulations (IFRA, CLP, REACH, Prop 65)?
Yes. All essential oil blends created in our mixing workshop comply strictly with IFRA (International Fragrance Association) standards. We provide complete Safety Data Sheets (SDS), CLP pictogram guidelines for EU imports, and California Proposition 65 compliance certificates upon request. Our essential oils are formulated to maintain high flashpoints and long shelf stability.
How can end-users clean or re-use the crystal stones when switching fragrance scents?
Natural raw quartz and fluorite crystals can be easily refreshed by washing them in warm water with a mild neutral soap, rinsing thoroughly, and allowing them to air dry completely under sunlight for 24 hours. Once dry, the stones are completely cleansed of residual scent molecules and ready to absorb a new essential oil fragrance profile. Volcanic lava rocks can be warm-rinsed to remove scent buildup.
What custom packaging and finishing services does Shanghai Qusden offer in-house?
Our 10,000 m² factory operates dedicated lines for glass container spraying, precision screen printing, gold/silver hot stamping, paper cutting, board creasing, and rigid box folding. We manufacture complete custom packaging units in-house—including custom high-density EVA foam inserts that hold heavy crystal stones securely alongside delicate glass dropper bottles.
Which trade and payment terms does Shanghai Qusden accept for international export?
We support flexible trade terms including FOB (Shanghai/Ningbo), CIF, CFR, and EXW. Accepted payment methods include T/T (Telegraphic Transfer), L/C (Letter of Credit at sight), Credit Card, PayPal, and Western Union, all settled in USD.
