Corundum Specimens / Rough (Black)
Small rough pieces of Black Corundum, measuring 10-20MM approximately, and sold singly.
These are lab grown, intended as an abrasive.
|Buy 5-9 pieces for||£0.90|
|Buy 10-19 pieces for||£0.85|
|Buy 20+ pieces for||£0.80|
Rough Black Corundum
Small rough pieces of Black Corundum, a form of Aluminium Oxide famous for forming Rubies and Sapphires. These are lab grown, intended as an abrasive.
These pieces measure 10-20MM approximately and make a decent study specimen; they can also be used for gravel due to their low price and nice contrast with white stones like Quartz. They are sold singly.
As quite a hard stone, these pieces may be suitable for rock tumbling. It is a good idea to try the lower priced black Corundum before tumbling even low grade Ruby or Sapphire, which are more expensive by far.
The pictures you see here are representative of the products and are usually not the exact item you will receive. Where various grades are available we do try to photograph each grade - but some photographs are still on their way!
Frequently asked questions and delivery information
How do we grade stones?
There is no overall universal grading system for the majority of our products. As such, the grades we use are internal only. They simply refer to higher and lower qualities, but they may be entirely different grades to other websites. C grade pieces are of lower quality than B grade, which is lower than A grade.
How does our ordering and delivery process work?
You place an order via the website. When it’s been picked and packed, your order will be marked as completed and dropped off at our local post office. We have an account with the post office called a “Drop and Go” account, which allows the post office staff to process our parcels when they have free time, rather than me queuing up and delaying everyone else.
I get tracking information etc online when this has been completed. I typically do not send tracking information to customers unless they request it – but if you’ve requested tracked postage, it has been sent tracked! If you have any worries or concerns about your parcel being delayed please feel free to get in touch and I’ll send the tracking info over! We also get delivery confirmations for parcels over 25MM thick by default.
How do international orders work?
After Brexit, with the UK leaving the European Union, certain things have changed with regards to international orders. European Union customers will now likely be liable to pay the same amount of import VAT as any other international customers. You will be responsible for any customs and import fees.
I’d like to return my order for a refund.
No problem at all – just get in touch and we’ll arrange it. You can read our full returns policy here.
What payment methods do you accept?
I can accept Paypal, Stripe, cheque, and direct bank transfers. Paypal and Stripe will both allow you to pay with credit and debit cards.