The Lovenhall RegistryThe LovenhallRegistry
The Registry

What we read

What the house knows how to read — 65 entries across 6 rooms, with the checks that settle each one, free and in the open.

6 rooms65 entries98 pages beneath them

Every category hides its identity somewhere different. A handbag keeps it in how the pattern was cut and how the stitch was made. A watch keeps it inside the case, where reading it costs a watchmaker's twenty minutes. A diamond keeps it in a laboratory's records, which anyone can check online for nothing. A painting keeps it in a catalogue and in whoever is still willing to speak for the artist. A ring wears it on the inside of the shank, stamped into the metal. A mineral hides nothing at all — it just needs asking the right three questions.

So there is no single checklist here, and that is deliberate. There is one page per entry, in that entry's own terms, with the checks ordered by how much each one actually settles. Start with the room, then the name.

Two of the rooms are asking a different question from the other four. Nobody counterfeits amethyst, they mistake it for something else, so the stone room identifies rather than authenticates. And a hallmark is already in front of you when you look it up — what you want to know is what it promises, and whether the metal beneath it keeps the promise.

Lovenhall Diamond

Verify a diamond certificate, or authenticate signed jewellery

Two questions, two answers: whether a grading report is genuine and describes your stone, and whether a signed piece is the house it claims to be.

All the laboratories and houses in Lovenhall Diamond
Lovenhall Art

Authenticate a work of art

Who is allowed to speak for each artist, what the catalogues record, and what a loupe settles before either of them is needed.

All the artists in Lovenhall Art
Lovenhall Ring

Jewellery Hallmarks: What the Stamp Inside Your Ring Means

A page for each mark people actually find — 925, 750, 585, 375, PLAT, GP, 800 — with what it guarantees, what it does not, and how to check the metal agrees with it.

All the hallmarks in Lovenhall Ring
Lovenhall Stone

How to Identify Rocks, Minerals and Crystals

A page for each of the minerals people actually pick up, with the three field tests that settle most of them and an honest account of what a photograph cannot reach.

Quartz

Every continent — the commonest mineral in the crust

Hardness 7, no cleavage, a glassy conchoidal break and no fizz in acid. The mineral most finds turn out to be.

Read the checks

Amethyst

Brazil, Uruguay, Zambia, Madagascar, Arizona

Purple quartz, hardness 7, coloured in visible zones. The zoning is what separates it from dyed stone and glass.

Read the checks

Agate

Brazil, Uruguay, India, Mexico, Germany (Idar-Oberstein), Scotland

Banded chalcedony — quartz in microscopic fibres. Hardness 7, waxy rather than glassy, and dyed on an industrial scale.

Read the checks

Pyrite

Spain, Peru, Italy, and almost every sulphide deposit on earth

Fool's gold. Brittle where gold is malleable, streaks greenish-black where gold streaks yellow, and a quarter of gold's density.

Read the checks

Obsidian

Iceland, Mexico, Oregon, Armenia, Turkey — anywhere rhyolitic lava cooled fast

Natural volcanic glass. Not a mineral at all, strictly, and the hardest of all to separate from the manufactured kind.

Read the checks

Turquoise

Iran, the American Southwest, China, Egypt, Mexico

The most heavily faked stone in the trade. Most of what is sold as turquoise is dyed howlite, reconstituted powder or plastic.

Read the checks

Amber

The Baltic coast, the Dominican Republic, Myanmar, Mexico

Fossil tree resin, and the one material in this room with a decisive home test: it floats in salt water.

Read the checks

Malachite

The Democratic Republic of the Congo, Zambia, Morocco, Arizona

Copper carbonate in concentric green bands. Soft, dense, fizzes in acid, and imitated in resin constantly.

Read the checks

Jade

Myanmar (jadeite), China, Canada, New Zealand, Guatemala (nephrite and jadeite)

Two different minerals share the name, and a dozen cheaper stones borrow it. Density and toughness separate them.

Read the checks

Lapis Lazuli

Badakhshan, Afghanistan — the same mines for six thousand years — with Chile and Siberia

A rock rather than a mineral: lazurite blue, calcite white and pyrite gold. The pyrite is the signature.

Read the checks

Hematite

Brazil, England (Cumbria), the Lake Superior region, Australia

Metallic grey with a blood-red streak. And the one mineral whose imitation is exposed by a fridge magnet.

Read the checks

Fluorite

China, Mexico, England (Weardale and Castleton), Illinois, Namibia

The Mohs 4 reference mineral. Cubes, perfect octahedral cleavage, and the mineral that gave fluorescence its name.

Read the checks

Calcite

Everywhere. It builds limestone, marble, chalk, stalactites and most shells

The Mohs 3 reference. Fizzes in vinegar, cleaves in three directions, and doubles the image of a line seen through it.

Read the checks

Labradorite

Madagascar, Finland (spectrolite), Labrador in Canada, Russia

Grey feldspar that flashes blue and gold from one angle only. The flash is structural, and it cannot be dyed in.

Read the checks

Selenite

Morocco, Mexico (Naica), Oklahoma, Australia

The Mohs 2 reference — a fingernail scratches it. Soft, light, water-soluble, and mislabelled constantly.

Read the checks

Opal

Australia (Lightning Ridge, Coober Pedy), Ethiopia, Mexico, Brazil

Hydrated silica with no crystal structure. Light for its size, easily cracked, and sold as doublets and triplets far more often than solids.

Read the checks
All the minerals in Lovenhall Stone

Before you start

What can The Lovenhall Registry help me identify?
Six categories: diamonds and signed jewellery, works of art, luxury watches, designer handbags, the hallmarks stamped inside a ring, and rocks, minerals and crystals. The house publishes the checks for 65 entries across those rooms, free and in the open.
Does the house issue certificates of authenticity?
No. The Registry makes instruments and publishes what an authenticator looks at. It issues no opinions, no certificates and no verdicts, and it takes nothing in.
Is a serial number enough to prove something is genuine?
Almost never. Serials and date codes are copied freely, and most of these makers run no public database you could check one against. Construction, materials and internal consistency are the evidence; a code is a supporting detail.
When should I pay for professional authentication?
When the object is worth more than a few hundred dollars and you intend to buy, sell or insure it. A written opinion costs a small fraction of the item and is what a resale buyer will ask you for.
Are these checks the same ones a professional uses?
They are the checks a professional starts with, ordered by how conclusive each one is. What a professional adds is reference material, comparison against known-genuine examples, and in some categories equipment — which is why the expensive pieces still warrant one.
The Lovenhall RegistryThe Registry

A name we do not read yet

If the maker you are holding is not in the case, write and say so. The rooms grow in the order people ask.