Clear answers before choosing a stone.

Yes. Joyzanite sells natural polished tanzanite stones only. Every stone offered for sale is checked through gemological observation, including refractometer and microscope examination, to rule out imitations and confirm the stone identity.

Heating is a common treatment for tanzanite. It often reveals clearer blue to violet-blue tones. Unheated tanzanite keeps its natural expression from the deposit, sometimes with more complex colours and a character valued by collectors.

No. Unheated tanzanite can show yellow, green, brown, grey, violet, very dark brown or almost black tones. The colour depends on the stone, its orientation and the light used for observation.

No. Joyzanite focuses on natural stones. The market may include imitations or synthetic materials; this is why gemological identification and, when appropriate, independent certification matter.

Yes, depending on the stone. GIA or another recognised laboratory certification can be added to the order, especially for an important stone, an unheated tanzanite, a collector purchase or an international transaction. Laboratory work adds time.

Not automatically. All Joyzanite stones are checked before publication, but an independent certificate remains an option depending on value, project and the level of documentation desired.

Delivery options can be selected stone by stone in the cart. For a valuable stone, secure delivery with tracking, insurance and signature is recommended to reduce logistics risk.

The order is recorded, the selected stone or stones can no longer be ordered, and the client receives a summary. A sold stone may remain visible as a collection reference, clearly marked as sold, without a displayed price.

Display currencies make reading easier for international visitors. CHF remains Joyzanite’s reference currency and the final payment currency to avoid conversion discrepancies at checkout.

No. Joyzanite does not promise any return or future appreciation. A stone should be chosen for its beauty, rarity, dossier, treatment and fit with your project.

Yes. For an important stone, additional photos or a square-format video can be requested before purchase when the available dossier is not enough for a comfortable decision.

A sold stone may remain visible as a collection reference and proof of previous selection. It must be clearly marked as sold, hide its price and no longer be orderable.