Help
Questions & answers
By Mrema and the Gemstone Cutter (T) Investment team, Kibo Tower, Moshi · Updated 30 October 2026
Ordering and payment
How do I order?+
Choose a piece on our website and send the order form. We call you to confirm the details, payment and delivery before anything is charged.
Do I pay online?+
No. There is nothing to pay on the website. We call you first to confirm your order, then agree payment with you.
Which currencies do you show?+
You can view prices in Tanzanian shillings, US dollars or euros using the currency switch at the top of every page.
How quickly will you contact me?+
We reply to every order and enquiry within 24 hours.
Delivery and collection
Do you ship internationally?+
Yes. We ship worldwide. We confirm the delivery method and cost with you on the call before you pay.
Can I collect from your shop?+
Yes. You can collect from our showroom in Kibo Tower, Ground Floor, Room 4B, Moshi. We are open Mon–Sat 8:30 am – 6 pm, Sun 9 am – 5:30 pm.
Stones and certificates
Do your stones come with a certificate?+
Yes. Every stone comes with a GIA certificate and our own Gemstone Cutter (T) Investment certificate.
Is your tanzanite heat-treated?+
Yes. Like most tanzanite on the market, our tanzanite is heat-treated to bring out its blue and violet colour. We state this on every stone.
Where does your tanzanite come from?+
Tanzanite is mined only in the Merelani Hills of northern Tanzania. Our owner Mrema has over 20 years of experience sourcing and cutting stones from the region.
How should I care for tanzanite?+
Clean it with warm water, mild soap and a soft brush. Avoid ultrasonic and steam cleaners, sudden temperature changes and hard knocks.
Custom orders and visits
Can you make a custom piece?+
Yes. Choose a stone and tell us what you want, such as a ring, pendant or earrings. Send a custom order request and we will get back to you within 24 hours.
Can I visit the shop?+
Yes, no appointment needed. We are open Mon–Sat 8:30 am – 6 pm, Sun 9 am – 5:30 pm at Kibo Tower Building, Ground Floor, Room 4B, Moshi.
Keep reading
Tanzanite: the complete guide
What it is, where it comes from, colours, value and care.
Tanzanite price per carat
What a carat costs and why, with real prices from our shop.
Buying tanzanite in Tanzania
How to buy safely as a visitor, and what paperwork to ask for.
Visit our Moshi showroom
Address, opening hours and how to find us in Kibo Tower.