Product image from current catalog dataProduct overview
What you're actually getting
This listing sells two 10mm trillion-cut blue stones marketed as tanzanite, roughly 2.4 carats each (about 6.25 carats combined per the listing), and marketed for 'unisex' jewelry-making use. Amazon lists the product under the Wixine storefront name, though search results also show the same listing associated with a 'CYOIDAI' branding on the product's meta title in at least one cached version — a common pattern with resold or rebranded Amazon marketplace listings, so don't be surprised if the on-page brand name varies slightly from what you see elsewhere.
The listing describes the stones as untreated and grades them 'AA.' It's worth knowing that AA/AAA/AAAA-style grading on colored gemstones is not a standardized, GIA-regulated scale — it's an informal, seller-defined term that varies from company to company, so 'AA Grade' here reflects the seller's own internal labeling, not a universal quality benchmark.
Genuine natural tanzanite is a real, valuable gem mined almost exclusively in Tanzania, and virtually all natural tanzanite on the market is heat-treated to develop its blue-violet color — untreated natural tanzanite of this size and clarity would be unusual and typically commands a significant price. We did not find a lab certificate (GIA, AIGS, or similar) attached to this specific listing confirming the stones are natural tanzanite versus a simulant, treated stone, or synthetic — buyers should treat 'untreated tanzanite' as an unverified seller claim at this price point.
On the positive side, the product carries a reported 4.6 out of 5 star rating from about 50 ratings on Amazon, with the large majority being 5-star, and available review snippets mention the cut being 'nice and even' and suitable for jewelry-making. That's a reasonably strong satisfaction signal for a low-cost loose-stone listing, even without independent gemological verification.
There is no evidence of independent hands-on testing (refractive index, specific gravity, or spectroscopy) publicly available for this exact listing. Given the price point typical of these multi-piece loose-stone Amazon listings, buyers should assume this is a decorative/craft-grade stone unless they get it independently appraised, rather than assuming lab-grade natural tanzanite.
Bottom line: reasonable customer satisfaction for jewelry-making purposes, but the 'untreated natural tanzanite' and 'AA Grade' claims rest entirely on the seller's word, with no third-party certificate found to back them up.
Key Listed Features
Two 10mm trillion-cut blue stones, roughly 2.4 carats each (about 6.25 carats total per listing)
Marketed as natural, untreated tanzanite with a seller-assigned 'AA Grade'
Marketed for unisex jewelry-making use
Reported 4.6/5 star rating from about 50 Amazon ratings
No independent lab certification found for this specific listing
