Juglans hindsii
Claro Walnut
California's figured walnut — the wildest figure in the walnut family. Graft unions between English walnut and Hinds' rootstock produce violet, gold and marbled patterns no other walnut can match.
Premium import, sourced outside EuropeFamily: Juglandaceae
Tree
Native to Northern California, not Europe. Claro reaches EU yards as imported tablestock and slabs, usually cut from orchard trees where Juglans regia was grafted onto Juglans hindsii rootstock for nut production. The graft union, root crown and crotch sections carry the figure that makes this wood sought after. Stocks in Europe are limited and lot-driven — what arrives is what was milled.
Wood appearance
Heartwood ranges from chocolate brown to purple-grey, often streaked with violet, gold and reddish tones. Sapwood is pale cream and usually contrasts sharply. Figure is the headline: fiddleback, marbled, feathered crotch, and dense burl clusters are common in graft-figured boards. Grain is typically straight in clear sections but wild around figure. Medium texture, satin natural lustre.
- Chocolate-brown to purple-grey heartwood
- Violet, gold and reddish streaking
- Pale cream sapwood with sharp contrast
- Fiddleback, marbled and crotch figure common
- Often heavily figured; prized for slabs.
Mechanical properties
| Density (kg/m³) | 600–680 kg/m³ |
|---|---|
| Janka hardness (N) | 4,700–5,400 N |
| Radial shrinkage | 4.0–4.7 % |
| Tangential shrinkage | 6.0–7.0 % |
| Volumetric shrinkage | 10.2–11.2 % |
| Natural durability (EN 350) | Class 2 — Durable |
Working with it
1 = difficult · 5 = excellent
Works well by hand and machine across sawing, planing, sanding, turning and carving. Glues and screws without drama. Wild grain around figure and burl tears out easily — back off feed rates, use sharp tooling, and finish-sand rather than hand-plane figured zones. Steam-bending is moderate at best; not the wood for tight curves. Note: published laboratory data for Claro is limited — no reliable MOR or MOE figures exist. For structural calculations, treat mechanical properties as broadly comparable to Black Walnut (Juglans nigra) and design with that proxy in mind.
- Sawing
- Planing
- Sanding
- Turning
Drying
Dries at a moderate rate. Shrinkage is moderate (radial 4.0–4.7%, tangential 6.0–7.0%, volumetric 10.2–11.2%) with a tangential-to-radial ratio around 1.5 — manageable, but figured and crotch sections can check or honeycomb if pushed. Slow kiln schedules and weighted stickering are standard for slab stock. Acclimatise indoors for several weeks before machining.
Finishing
Takes oil, hardwax and lacquer cleanly. Oil finishes deepen the violet and gold tones and lift the chatoyance in fiddleback areas — worth a sample board before committing. Sand to 180–220 grit; going finer can close the surface and dull the figure. Open pores will show under high-build finishes, so grain-fill if a glass-flat surface is required.
Durability and safety
- Class 2 — Durable
- Food contact safe
- Dust irritant: wear PPE
Walnut dust contains juglone and is a known respiratory and skin sensitiser. Use extraction at the source, wear an FFP3 mask when sanding, and keep offcuts away from horses and dogs — juglone is toxic to both. Cured finished surfaces are food-contact safe.
Best uses
- Heirloom dining tables
- Statement live-edge slabs
- Executive desks
- Gun stocks
- High-end cabinetry feature panels
Pairs and substitutes
Pairs well with
Often substituted for
Sourcing and sustainability
- Premium import, sourced outside Europe
- IUCN: LC — Least Concern
IUCN Least Concern, no CITES listing. EN 350 durability class 2 (durable) in heartwood; sapwood is not durable and is not rated for ground contact. Most Claro on the European market comes from Californian orchard culls and salvage rather than forest harvest, which suits the figured-tablestock trade. EUDR due diligence is in preparation and becomes mandatory for large operators from 30 December 2026, and KORENA is building each slab passport to carry origin, species, and supplier provenance.
Buyer questions
Is Claro Walnut a good choice for furniture?
Claro Walnut is best matched to projects such as Heirloom dining tables, Statement live-edge slabs, Executive desks, Gun stocks, High-end cabinetry feature panels. The final choice should consider grain, finish, movement allowance, and the room where the piece will live.
How hard is Claro Walnut?
The listed Janka value is 5,030 N and the density is 640 kg/m³. Use these as comparison signals, not as a guarantee of how a finished surface will wear.
What should I check before buying Claro Walnut slabs online?
Check measured length, width stations, thickness, drying method, moisture notes, colour variation, defects, and origin. Compare the measured outline against the finished drawing before reserving the slab.
Current stock
No Claro Walnut in the current drop
This species is in the KORENA reference list, but there are no live pieces for the selected store right now. Check the journal or catalogue for nearby alternatives.
Get notified about Claro Walnut
We email you when fresh Claro Walnut slabs land at KORENA. Each piece is one of one, so early notice matters.
Sources
- The Wood Database(accessed 2026-05-09)
- USDA FPL Wood Handbook FPL-GTR-190 (2010)(accessed 2026-05-09)
- Meier, E. — WOOD! Identifying and Using Hundreds of Woods Worldwide (2015)(accessed 2026-05-09)