Loose Gemstones

Violetish Blue Tanzanite Oval 4.7 ct

Violetish Blue Tanzanite Oval 4.7 ct

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Gorgeous Violetish Blue Tanzanite, well above what you normally see in a high street jewellery store, in terms of both, size and quality. In daylight this stone is medium inky blue, not too dark and not too light. It changes into violetish blue under incandescent light that is stronger on the red end of the spectrum. This is a norm for fine Tanzanites and is part of this gemstone's charm. A couple of inclusions inside are mostly transparent and don't detract from the appearance of this beautiful gem. Tanzanite of this shape and size can be used to create truly special jewel, like a necklace or coctail ring.
Stock Unit No. GB/RZ/LTA/1001
Gemstone Tanzanite
Gem Colour Blue
Shape Oval
Weight 4.7 ct
Dimensions 10.5x9.52x6.51 mm
Clarity VS 2
Country of Origin Tanzania
Enhancements Heated
Shipped From United Kingdom



Tanzanite is a blue to violet variety of mineral Ziosite that belongs to orthorhombic crystal system. It was discovered in 1967 in the foothills of Mount Kilimanjaro which is its only commercial source to this day. Tanzanite is strongly trichroic while unheated and will appear blue, pink or yellowish depending on orientation of the crystal. Most Tanzanites however are found in colour which requires improvement through heating that drives the yellow component out. Resulting stones are dichroic blue-violet. This optical property makes a proper orientation of the rough material for cutting very important, to show the best hue facing up. In any case Tanzanite always shows more purple under incandescent light and more blue in daylight. Violetish blue is considered the top colour but the most important pricing factor is saturation as there is a huge difference between pale commercial stones and unique vivid inky gems. Classified as a Type I gemstone Tanzanite is expected to be eye-flawless if rated VVS. With a 6.5 hardness, Tanzanite is a bit softer than Quartz that is a common component of dust and soil. It is also relatively brittle so normally used for pendants, earrings or cocktail rings. For cleaning we recommend soft brush or cloth and a running water to remove the dirt without causing unnecessary abrasion.


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Pictures- All Images used by us represent the actual item on sale unless stated otherwise. We try to depict each jewel and gem as accurately as possible and do not use colour altering techniques during post processing stage. Please note that our images usually show objects in high magnification as to enable you to inspect them in close detail, the actual measurements are given in products' description and you should reflect on them while considering the purchase. Pictures showing gems are many times their size and may show you more imperfections (inclusions, imperfections of cut and polish) than you will see while holding the same gem in your hand. Certain gems like opals do not look the same under different lighting conditions or from all directions and in such case we chose the best shots to show potential of the stone. Purchasing- Once you are ready to complete your purchase, click on the "Checkout" button. This will open a new tab where you will be asked to provide your details and ultimately a PayPal® Payment window in your browser will open and you will be given instructions for completing the transaction. PayPal® will accept payment from either your PayPal® account or your credit or debit card (you do not need to have a Paypal account). All transactions conducted this way are extremely secure and ensure that no-one has access to your credit card information. Once you have completed the process, you will receive a confirmation email to indicate that we have received your order. This does not indicate that a contract exists between us. We have included this term to protect us in the case that we are no longer able to supply a particular product for some reason. You will receive another email once we have accepted your order. If you would prefer to pay by another method such as bank transfer or personal cheque please contact us to arrange this. Shipping- For security reasons we will only use insured types of shipment. Please be aware that if you order from abroad you may be liable for paying appropriate duties and taxes.

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