Scintessa
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Scintessa

A diamond & gemstone auction house. Certified stones, sourced at wholesale, opened to bid — brilliance, within reach.

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Scintessa

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Sale alerts and new-lot notices, sent when a sale opens. No noise.

© 2026 Scintessa. A trading name of Xzist Assets Ltd, registered in England & Wales.

Precious-metal articles are hallmarked in accordance with the Hallmarking Act 1973; our Dealer’s Notice is displayed in the terms. Diamonds and gemstones are certified by independent laboratories.

A note on cookies

Scintessa uses only essential cookies — the ones that keep you signed in and let you bid and check out. We don’t use advertising or third-party tracking cookies. Read our Cookie Policy.

Legal

Cookie Policy

This policy explains how Scintessa uses cookies. In short: we use only the cookies we need to run the saleroom, and none for advertising or tracking.

Last updated 19 July 2026

What cookies are

Cookies are small text files a website stores on your device. They let a site remember things between pages and visits — for example, that you are signed in. Similar technologies (such as your browser’s local storage) work in comparable ways; where we refer to “cookies” below, we mean cookies and those similar technologies.

How Scintessa uses cookies

We keep our use of cookies deliberately minimal. Scintessa sets only strictly necessary (essential) cookies — the ones required for the site to work and for you to sign in, place bids and pay. We do not use advertising, marketing, analytics or third-party tracking cookies, and we do not sell or share your browsing activity for advertising.

Because these cookies are essential to a service you have asked for, they don’t require consent under the Privacy and Electronic Communications Regulations (PECR). We still ask for your choice, and set it out here, so you always know what is stored on your device.

The cookies we set

CookieProviderPurposeTypeExpiry
sb-*-auth-tokenSupabase (our database & authentication provider)Keeps you securely signed in so you can bid, manage your account and check out. Set only after you sign in.EssentialPersists across visits until you sign out or the session expires (refreshed periodically while you’re active).
scintessa_consentScintessaRemembers your cookie choice so we don’t ask again on every visit.Essential12 months.

We may also rely on short-lived, strictly necessary cookies set by our hosting platform to keep the service secure and available (for example, to balance load or protect against abuse). These do not track you across sites.

Third-party and tracking cookies

We don’t embed advertising networks, social-media trackers or analytics tags that set cookies. Some pages display images and certificates hosted by us or by independent gemmological laboratories; these are used to show you a lot and are not used to profile you.

Managing cookies

You can accept or decline non-essential cookies using the notice shown on your first visit; you can also control cookies through your browser settings, including deleting cookies already stored and blocking new ones. Because our cookies are essential, blocking them will stop you from signing in and bidding, and parts of the site may not work.

Guidance for common browsers is available at aboutcookies.org.

Changes to this policy

If we introduce any new cookies — for example, optional analytics — we will update this policy and, where the law requires it, ask for your consent before they are set. Please check back from time to time; the date at the top shows when this policy was last revised.

Contact

For anything about this policy or your data, see our Privacy Policy or email us at support@scintessa.com.