Gemstones
A single-source gemstone, a complicated industry, and a great deal of confident nonsense talked at tourists.
Tanzanite is found in commercial quantity in one place on earth, a small area near Mererani in the shadow of Kilimanjaro. That makes the geology interesting and the market opaque: there is no exchange price, grading is done by eye, and the spread between a poor stone and a fine one of the same weight is enormous.
What this journey does is put the vocabulary in your hands before anybody quotes you a figure. Colour, saturation, tone, clarity, carat; rough beside cut; what the orientation of the rough does to the value; and what the export certificate is, who issues it, and what happens at the airport without one.
We take no commission from any dealer. If that ever changes you will be told in writing before you travel. subject to confirmation: confirm this is and will remain the arrangement.
Who this suits
You intend to buy a stone and would rather understand it first.
You are interested in how a single-source industry actually works.
You want the export paperwork explained by somebody with nothing riding on the sale.
You have two or three spare days around Arusha.
What a day looks like
Indicative rather than fixed — this is a shape, not a schedule.
The groundwork
What tanzanite is, why it is found in one place, what the grades mean, and what you are likely to be shown and told over the next two days.
The mining area
About ninety minutes from Arusha, with time at a licensed dealer and, where permitted and safe, at surface workings.
The cutting workshop
The part that explains the price: how the orientation of the rough decides most of the value, and how much weight is lost to get there.
Grading
Stones side by side under controlled light, which is the only way the vocabulary becomes real.
Paperwork
If you buy, the export documentation done properly, before you leave the building.
When is the best time to go?
Every month in Tanzania is a different trip. Choose one to see what the weather and the wildlife usually do, and how busy it gets.
Green season
January
Mid-summer in Tanzania
- The short rains have usually finished. Hot, mostly clear, with the odd afternoon shower still possible.
- The southern Serengeti and the Ndutu area are green, and the wildebeest calving season is normally under way there.
Green season
February
The calving month
- Usually the hottest and clearest month of the green season.
- Calving continues around Ndutu. Predators concentrate there, which is why February is the month most photographers ask for.
Long rains
March
The long rains begin
- Rain usually arrives in the second half of the month, often as heavy afternoon storms rather than all-day drizzle.
- Black-cotton tracks in the western Serengeti start to become a problem. Routes need to stay flexible.
Long rains
April
The wettest month
- The wettest month in most of the country. Some camps close.
- Landscapes are at their greenest and the parks are nearly empty. Travel times between places go up, sometimes a lot.
Long rains
May
The rains ease
- Rain usually eases through the month, though the first half can still be very wet.
- A good month for value if you can accept that some roads and airstrips are still affected. Check camp access close to travel.
Dry season
June
The dry season opens
- Dry conditions return across the north. Mornings get properly cold, especially on the Ngorongoro rim.
- Wildlife begins to concentrate around permanent water, which is what makes the dry months easier for game viewing.
Dry season
July
High season begins
- Reliably dry and cool. The busiest month in the northern parks, and the month camps sell out first.
- River crossings in the far north normally begin somewhere in the July-to-October window. Nobody can book a crossing.
Dry season
August
Peak dry season
- Clear skies and firm tracks almost everywhere. Dust is the trade-off.
- The Mara River crossings are most often reported in August and September, but they depend on rain hundreds of kilometres away.
Dry season
September
Dry and settled
- Much like August with slightly fewer people and slightly warmer days.
- One of the best months for the southern parks, Ruaha and Nyerere, where the dry season concentrates game on the rivers.
Dry season
October
The end of the dry
- Hot and dry, with the first storms sometimes arriving late in the month.
- Game viewing stays strong right up to the break in the weather, and the parks begin to empty.
Short rains
November
The short rains
- Short, sharp showers, usually in the afternoon, rarely all day.
- The landscape greens quickly and visitor numbers drop. One of the better months for value in the north.
Green season
December
Green, and then festive
- Warm with scattered showers. The first half is quiet; the second half is one of the busiest periods of the year.
- Festive-season rates and minimum stays apply at most camps from around the twentieth.
Patterns, not forecasts. Rainfall and temperature vary by region and year, and wildlife movement is seasonal rather than scheduled — no operator can promise a river crossing or a calving herd on your dates. These figures are indicative and have not yet been checked against a dated meteorological source. (subject to confirmation)
Practical and safety notes
| Point | Detail |
|---|---|
| Export rules | Tanzania regulates gemstone export and buying without correct documentation can mean the stone is seized on departure. subject to confirmation: confirm the current rules with the Mining Commission and record the date checked. |
| No mine entry | Working shafts are industrial sites and access is controlled by the licence holders. Operators promising a mine tour are usually showing you a surface pit. |
| Our commission | None, from any dealer. Stated here so you can hold us to it. |
| Independent certification | Worth it above a certain value. We can point you at laboratories; we will not vouch for a stone ourselves. |
| Ethics | A formal licensed sector alongside small-scale operations with real safety and labour problems. We work with licensed dealers and that does not settle the question for the industry. |
Everything on this page that depends on a real-world fact — a price, a permit, a seasonal pattern, a supplier — is a draft and is registered in CHANGE-LATER.md. Nothing here is a quotation.
Questions
Is it cheaper to buy in Tanzania?
Often, not always, and it depends entirely on the grade you end up with. The value of this journey is knowing what you are being shown before you are quoted a price.
Will I get inside a mine?
Almost certainly not, and we will not promise it.
Can I take the stone home?
With the correct export documentation, yes. Without it you risk losing it at the airport. The rules change and we date what we tell you.
Journeys that do this
Starting points. Each one is rebuilt around the people travelling.
Tell us what you have in mind.
One conversation with the person who would plan it, and an honest answer about whether we are the right company for the trip.
Free, and with no obligation. A real planner replies within 24 business hours, East Africa Time. No payment is taken to enquire.