Black Quartz nanostone
Nanostone consists of 25% spinel crystals artiﬁcially grown in a glass matrix of silicon oxide, aluminum oxide and magnesium oxide. Completely lead-free and ﬂuoride-free composition is the main advantage of our material. Nanostone is perfect for accurate imitation of precious stones of a wide color range, even unique colors which are not found in nature. Nanostone is passive to thermal destruction of the structure and surface, does not change color and fade even with a sharp thermal shock up to 1000 °C. In terms of hardness and optical properties, Nano is very close to amethyst and synthetic emeralds.
Lead and fluorine free
Mohs hardness: 7
Refractive index: 1.55-1.60
Density (g/cm3): 2.8-3.0
Heat resistance: up to 1600℃/2912℉
Please note that we may only accept returns for items that are not used or cut and in original condition, within 30 days of purchase.
To exchange one or more items in your order, we invite you to contact us within 30 days of delivery. We will issue a Return Authorization Number to you by email and a shipping courier will then organize a pick-up to send the parcel back to our premises. The returned item(s) will then pass a mandatory Quality Control before we can send you the replacing item(s).
All items returned via our online shop will pass a mandatory Quality Control, after which you will get notified if your return is granted. Depending on your original mode of payment, it may take up to 15 working days before the refund is credited back to your bank account/credit card/Paypal account.
Orders placed from Monday to Friday by 11:00 (UTC+8) will be processed and shipped the same business day. Orders placed on weekends and national holidays will be processed and shipped the next business day. No deliveries are made on weekends or public holidays in Hong Kong. We do not ship orders or schedule deliveries on public holidays therefore deliveries may take longer than expected during these periods.
Shipping time: 2-4 Business Days after processing and shipping
Shipping Cost: depends on country of destination
Free shipping over: $5,000