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: 10
Number of measurements: 39
Max PZC read (of all measurements): 14.8
Min PZC read (of all measurements): 5.2
Max PZC average on one log: 14.1
Min PZC average on one log: 5.4
PZC Average of all logs: 11.1

Species: aspidosperma spp.
Family: Apocynaceae
Clade: Angiospermae
Description: Aspidosperma are medium to large trees (Apocynaceae) primarily valued for their durable timber (e.g., Peroba). They feature simple, often leathery leaves, small flowers, and distinctive woody follicles releasing winged seeds. Some species are also known for medicinal bark.
Other Local Names: My lady, Gavetillo, Jacamin, Ararauba, Copachi, Quillo caspi, Chichica, Shibadan, Kiantioutiou, Koumanti oudou, Chapel, Chaperna, Volador, Pelmax, Alcarreto, Pumaquiro, Kromanti kopi, Nielillo negro

Reference Colour: Light brown
Texture: Medium
Grain: Straight or interlocked
Interlocked Grain: Slight
Notes: Heartwood orange light brown sometimes with large pink veins.

Diameter: 60÷80cm
Density @12% MC: 940kg/m³
Janka Hardness: 2490lbf
Crushing Strength @12%MC: 89MPa
Static Bending Strength @12%MC: 153MPa
Longitudinal Modulus of Elasticity E: 26.14GPa
Volumetric Shrinkage Coefficient: 0.75% per %
Total Tangential Shrinkage TS: 9.8%
Total Radial Shrinkage TS: 6.3%
T/R Anisotropy Ratio: 1.6-
Fibre Saturation Point: 26%
Thermal Conductivity: 0.3W/mk
Lower Heating Value: 18720KJ/Kg
Sapwood Thickness: 3÷8cm
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 M – moderately durable Atlas of Tropical Timber Species ARARACANGA Cross sections of Aspidosperma album
Treatability: Class 3 – poorly treatable
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. This species naturally covers the use class 5 (wood permanently or regularly submerged in salt water, sea water or brackish water). 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 to slow
Drying Risk of Distortion: High risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: High risk

Blunting Effect: Fairly high
Sawing Tooth: Stellite-tipped
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: Heavy carpentry, Decking, Ship building (planking and deck), Bridges (parts in contact with water or, building (ribs) ground), Cabinetry (high-end furniture), Bridges (parts not in contact with water, or ground), Vehicle or container flooring, Poles, Built-in furniture or mobile item, Exterior panelling, Flooring, Sculpture, Industrial or heavy flooring, Hydraulic works (fresh water), Sliced veneer, Sleepers

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