Short answer: virgin cork bark is the raw outer bark of the cork oak, with natural ridges, curves and colour variation. For terrariums, vivariums and natural displays, CorkMart supplies it as hollow tubes and irregular branches, each sold by approximate weight from 0.5 to 3 kg. Every piece is unique, so choose by size class and purpose, and check suitability for any animal enclosure before use.
Tubes and branches: sizes by weight
Natural pieces are not standardised in length, diameter or shape, so they are sold by approximate weight:
| Size | Approximate weight per piece |
|---|---|
| Small | approx. 0.5 kg |
| Medium | approx. 1 kg |
| Large | approx. 2 kg |
| Extra large | approx. 3 kg |
- Virgin cork tubes: hollow or curved tube-like forms, useful as hides, tunnels and planted features.
- Virgin cork branches: branch-like irregular forms, useful for climbing structures, layering and natural compositions.
What makes virgin cork bark different?
Virgin cork is the first bark harvested from a cork oak. It is rougher and more irregular than the cork used for stoppers, which is why it is valued for decoration rather than for technical products. Unlike flat sheets or processed boards, bark pieces are three-dimensional: some are curved, some rugged, some deeply ridged. That variation gives designers, hobbyists and display builders more freedom to create a natural composition. Read more in our Portuguese cork guide.
Common uses
- Terrarium and vivarium hardscape.
- Hides, tunnels and textured climbing surfaces.
- Botanical displays, moss and epiphyte layouts.
- Retail display props and natural merchandising.
- Interior styling and craft projects.
How to choose pieces
Start with the scale of the space. Small and medium pieces are easier to position in compact terrariums and displays; large and extra-large pieces suit bigger enclosures, shop windows and installations. Tubes add volume and shelter; branches add height and line. Combining two or three sizes usually gives a more natural result than several pieces of the same size.
Because each piece is natural, its exact length, diameter and opening will differ from the photographs. If a piece must fit a specific space, measure the available area first and mention it in your order notes or request.
Using cork bark in animal enclosures
- Check that the piece suits the species, the humidity and temperature of the enclosure and your cleaning routine.
- Inspect each piece and clean it as recommended for your setup before placing it.
- Secure heavier pieces so they cannot roll or fall onto animals.
- Leave enough free space and ventilation around hides and tunnels.
- Monitor the piece over time and replace it if its condition changes.
Design tips
- Plan the layout before fixing anything permanently.
- Use lighting to bring out the ridges and texture.
- Pair cork with plants, stone and natural fibres for a cohesive look.
- For wall or display use, choose the fixing method according to weight and surface.
Frequently asked questions
How big is a 1 kg cork tube?
It varies. Natural pieces are sold by approximate weight, not by fixed dimensions, so length and diameter differ from piece to piece.
What is the difference between tubes and branches?
Tubes are hollow or curved, so they work as hides and tunnels. Branches are irregular, branch-like forms used for climbing and layering.
Is cork bark safe for reptiles and amphibians?
Many keepers use cork bark, but suitability depends on the species and setup. Verify it for your animals, humidity, temperature and cleaning routine before use.
Can I choose a specific piece?
Pieces are selected by size class. For specific dimensions or larger quantities, send your requirements through Request a Quote.
Explore Cork for Terrariums and Natural Displays or send project details through Request a Quote.
