No payment until we call to confirm

Help

Questions & answers

Order online with nothing to pay upfront: we call to confirm first, then ship worldwide or you collect in Moshi. Every stone comes with a GIA certificate and a Gemstone Cutter (T) Investment certificate. Can't find your answer? Contact us or email info@gemstonecutterinvestment.com.

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