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: 5
Number of individual trees analyzed: 6
Number of specimens: 16
Number of measurements: 54
Max PZC read (of all measurements): 23.1
Min PZC read (of all measurements): 8.1
Max PZC average on one log: 21.8
Min PZC average on one log: 8.9
PZC Average of all logs: 12.8

Species: astronium lecointei
Family: Anacardiaceae
Clade: Angiospermae
Description: A large tropical tree, highly valued for its dense, durable, reddish-brown wood often streaked with darker patterns. It features pinnate leaves and small flowers.
Other Local Names: Aderno-preto, Baracatiara, Gonçaleiro, Gonçalo-alvez, Guarita, Guaribu-preto, Mirueira, Sanguessugueira, Gusanero, Guasango, Palo de culebra, Urunday-para, Gateado

Reference Colour: Dark brown
Texture: Fine
Grain: Straight or interlocked
Interlocked Grain: Slight
Notes: Pinkish brown to yellow brown, becoming red brown to dark brown, with very irregularly spaced black brown veins.

Diameter: 60÷80cm
Density @12% MC: 800kg/m³
Janka Hardness: 1830lbf
Crushing Strength @12%MC: 76MPa
Static Bending Strength @12%MC: 96MPa
Longitudinal Modulus of Elasticity E: 16.5GPa
Volumetric Shrinkage Coefficient: 0.56% per %
Total Tangential Shrinkage TS: 7.9%
Total Radial Shrinkage TS: 4.3%
T/R Anisotropy Ratio: 1.8-
Fibre Saturation Point: 22%
Thermal Conductivity: 0.26W/mk
Sapwood Thickness: 4÷10cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 1 – very durable
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood)
Resistance to Termites: Class D – durable
Treatability: Class 4 – non-treatable Atlas of Tropical Timber Species
Use Class Covered by Natural Durability: Class 4 – in ground or fresh water contact
Durability Notes: This species is listed in the NF EN 350 standard. According to the European 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: Good
Drying Rate: Normal
Drying Risk of Distortion: Slight risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: Slight risk

Blunting Effect: Fairly high
Machining Tool: Tungsten carbide
Suitability for Peeling: Not recommended or without interest
Suitability for Slicing: Good
Assembly Nailing Screwing: Good but pre-boring necessary
Assembly Notes: High specific gravity: important that gluing be performed in compliance with the code of practice and instructions for the glue used.
End Uses: Turned goods, Interior joinery, Heavy carpentry, Flooring, Cabinetry (high-end furniture), Sliced veneer, Musical instruments, Decking, Panelling, Sculpture, Tool handles (resilient woods), Marquetry, Exterior joinery

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