Chatoyance was measured by the chatometry.com team using the PZC method. The statistics for this specific timber are hereby summarized to provide an evaluation of data robustness:
Number of sources for samples: 1
Number of individual trees analyzed: 1
Number of specimens: 2
Number of measurements: 6
Max PZC read (of all measurements): 8.7
Min PZC read (of all measurements): 7.0
Max PZC average on one log: 7.7
Min PZC average on one log: 7.7
PZC Average of all logs: 7.7

Species: testulea gabonensis
Family: Ochnaceae
Clade: Angiospermae
Description: Testulea gabonensis is a large evergreen tree native to West and Central African rainforests, known for its simple, leathery leaves and round to ovoid, green-yellow fruits containing a single, highly prized edible seed, often called Gabon nut or African walnut.
Other Local Names: Roné, N’gwaki, Aké, Akéwé, N’komi

Reference Colour: Yellow brown
Texture: Fine
Grain: Straight or interlocked
Interlocked Grain: Slight
Notes: Wood yellow brown to orangey yellow.

Diameter: 70÷100cm
Density @12% MC: 720kg/m³
Janka Hardness: 1560lbf
Crushing Strength @12%MC: 61MPa
Static Bending Strength @12%MC: 100MPa
Longitudinal Modulus of Elasticity E: 13.09GPa
Volumetric Shrinkage Coefficient: 0.48% per %
Total Tangential Shrinkage TS: 7%
Total Radial Shrinkage TS: 4%
T/R Anisotropy Ratio: 1.8-
Fibre Saturation Point: 25%
Thermal Conductivity: 0.24W/mk
Lower Heating Value: 20340KJ/Kg
Sapwood Thickness: 3÷5cm
Sapwood Demarcation: Not clearly demarcated

Resistance to Decay: Class 2 – durable
Resistance to Dry Wood Borers: Class D – durable (heartwood durable but sapwood not clearly demarcated)
Resistance to Termites: Class D – durable
Treatability: Class 3 – poorly treatable
Use Class Covered by Natural Durability: Class 3 – not in ground contact, outside Notes. This species is listed in the NF EN 350 standard. The possible presence of few demarcated sapwood may have an influence on the expected durability. According to the European Atlas of Tropical Timber Species IZOMBÉ
Durability Notes: This species is listed in the NF EN 350 standard. The possible presence of few demarcated sapwood may have an influence on the expected durability. According to the European Atlas of Tropical Timber Species IZOMBÉ Cross sections of Testulea gabonensis standard NF EN 335 of May 2013, performance length might be modified by conditions in which it is used.

Log Buoyancy: Does not float
Log Conservation: Moderate (treatment recommended)
Drying Rate: Normal to slow
Drying Risk of Distortion: Slight risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: High risk

Blunting Effect: Normal
Sawing Tooth: Ordinary or alloy steel
Machining Tool: Ordinary
Suitability for Peeling: Not recommended or without interest
Suitability for Slicing: Good
Sawing Machining Notes: Difficulties possible in planing due to interlocked grain.
Assembly Nailing Screwing: Good
Assembly Notes: Pre-boring sometimes necessary, in particular for small pieces.
Additional Notes: This wood must be machined with a moisture content inferior to the one usually, indicated for the forecasted end use
End Uses: Turned goods, Interior joinery, Ship building (planking and deck), Built-in furniture or mobile item, Shipbuilding (ribs), Moulding, Cabinetry (high-end furniture), Flooring, Stairs (inside), Sliced veneer, Vehicle or container flooring, Bridges (parts not in contact with water, Panelling or ground), Exterior joinery, Sculpture

Source 1: Tropical Timber Atlas, Editions Quae, e-ISBN 978-2-7592-2770-9