How to Tell Real Alabaster from Resin

Real alabaster lighting feels heavy and cool in the hand, glows unevenly with clouds and veins that run through the stone, and shows no mould seams or trapped air bubbles. Resin or glass imitations are usually lighter, warmer to the touch and more evenly lit. No single check is conclusive, so use several together.

key facts.

• Alabaster used for lighting is usually gypsum, a soft mineral of about 2 on the Mohs scale.
• Natural alabaster varies: clouding, veining and mineral inclusions differ from one block to the next.
• A pattern that repeats exactly from piece to piece suggests a cast or printed material.
• Weight, edges and the glow when lit are more useful clues than colour alone.
• Home checks give a strong indication, not proof. A written statement of material from the seller matters.

what are the quickest checks to tell alabaster from resin?

Use five checks in this order: look at the piece unlit, lift it, touch it, switch it on, and inspect the edges. None of them harms the piece.

1. Unlit look. Real alabaster shows soft clouding, faint veins and sometimes small mineral inclusions. No two pieces match. Painted or printed veins sit flat on the surface and repeat on every unit.
2. Weight. Gypsum is dense stone, so a solid alabaster shade feels noticeably heavier than a resin shade of the same size. Treat this as a clue, because fillers can add weight to resin and a thin stone shell can be light.
3. Touch. Stone draws heat from your hand, so it feels cool for the first few seconds. Resin sits closer to room temperature. Alabaster feels less icy than marble, so compare it with something you know.
4. Light. Hold a phone torch behind a thin edge or switch the lamp on in a dim room. Look for depth and uneven brightness that follows the clouding.
5. Edges and base. Cast pieces often show a faint seam where two halves of a mould meet, or tiny round bubbles under the surface. Carved stone shows fine tool and polishing marks instead.

how does a real alabaster glow look beside resin?

Real alabaster glows with depth. Light enters the stone, scatters and leaves it softened, with brighter and darker zones that follow the clouding. Resin tends to glow evenly, like frosted plastic, and glass is either clear or uniformly frosted.

Watch the veins as you move around the lamp. In stone they seem to sit inside the material and shift slightly with your angle. In an imitation a print or paint layer stays flat. A bright hot spot directly above the light source points to thin or uneven material, but it does not by itself tell you what the material is.

Calcite, sold as Egyptian alabaster, is also real alabaster. It is a different mineral, covered in Spanish alabaster vs Egyptian alabaster.

real alabaster vs resin or glass: a quick comparison.

Check	Real alabaster	Resin or glass imitation
Weight	Dense and heavy for its size	Resin is usually lighter; glass is heavy but looks clear or frosted
First touch	Cool, then slowly warms	Resin feels close to room temperature
Pattern	Clouding and veins differ on every piece	Pattern repeats from piece to piece
Veins when lit	Appear inside the stone and shift with angle	Sit on the surface and stay flat
Glow	Uneven, with depth and soft gradients	Even and flat, or sparkling in glass
Edges	Tool and polishing marks	Mould seams or tiny round bubbles in cast pieces
Fingernail on a hidden spot	Soft gypsum can take a faint mark	Glass will not mark

should I scratch or acid-test a lamp?

No. A fingernail on a hidden spot of a piece you already own is the most you should try, and it can leave a mark on soft stone. Never use acid on a finished lamp.

Hydrochloric acid is a geologist's method for separating calcite from gypsum alabaster, and it damages a polished surface. Conservation sources note that visual identification can be difficult and that a certain answer may need destructive testing. That is why the seller's written material statement and the look of the piece matter more than a risky home test.

does a very low price mean it is not alabaster?

Not on its own, but it is worth a question. Alabaster lighting involves quarried stone, careful carving and polishing and, on larger pieces, matching of sections. When a large piece sold as alabaster costs far less than comparable stone pieces, ask what the shade is made of.

A low price does not prove imitation and a high price does not prove stone. The material statement, the photographs and the answers you get carry more weight than the figure.

what should I ask a seller before I buy?

• Is the shade natural alabaster, and is it gypsum or calcite?
• Where is the stone from, and where is it carved and finished?
• Can I see photographs of the same piece unlit and lit?
• If the piece has several sections, how are they matched for colour and clouding?
• What do the warranty and returns terms say about natural variation?

how Teeshaa fits.

Teeshaa makes sculptural lighting in Spanish alabaster. Design is led from Bangalore, and the stonework, metalwork, engineering and assembly happen in Teeshaa's own facilities in India. Each stone is reviewed unlit and lit, and sections of multi-part pieces are matched for colour, clouding and transmission.

Natural variation is part of the material and is not treated as a defect under the returns policy. Read the material page for how the stone is chosen, or the guide to what alabaster is and why it glows. To compare stone with other natural materials, see alabaster vs marble vs onyx lighting.

To see the stone, visit the Bangalore design studio and workshop by appointment through the contact page. It is not a retail showroom, and there is no showroom in any other city. Pieces such as the Alabaster Linea Pendant and the Essenzo Porcini Table Lamp show the variation clearly. The full range sits under alabaster lighting.

frequently asked questions.

How can I tell if an alabaster lamp is real?

Combine several checks. A real alabaster lamp feels heavy and cool, shows clouding and veins that differ from piece to piece, glows unevenly with depth when lit, and has tool marks rather than mould seams at the edges. Ask the seller to state the material in writing.

Is real alabaster heavier than resin?

Usually yes. Gypsum is a dense stone, so a solid alabaster shade of a given size is noticeably heavier than a resin shade. Weight is only a clue, because filled resin can be heavy and a thin stone shell can be light.

Does real alabaster feel cold to the touch?

Stone draws heat from your hand, so alabaster feels cool at first and warms slowly. Resin feels nearer to room temperature. Alabaster feels less icy than marble, so compare it with a stone you know before relying on this test.

Can resin look like alabaster when it is lit?

A well made cast resin can look convincing at a glance, with a soft diffused glow. Differences show in the detail: the pattern repeats between pieces, veins stay flat on the surface, and the light lacks the depth and uneven gradients of natural stone.

Is Egyptian alabaster real alabaster?

Yes. Egyptian or Oriental alabaster is calcite, a harder calcium carbonate stone, while the alabaster used in most lighting, including Teeshaa's Spanish alabaster, is gypsum. Both are natural stone, but they are different minerals with different hardness and care needs.

Reviewed by the Teeshaa studio, 19 October 2026.

sources.

• Conservation Wiki: Alabaster
• Wikipedia: Alabaster