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: 6
Number of individual trees analyzed: 6
Number of specimens: 15
Number of measurements: 45
Max PZC read (of all measurements): 13.0
Min PZC read (of all measurements): 7.5
Max PZC average on one log: 12.0
Min PZC average on one log: 7.9
PZC Average of all logs: 9.5

Species: bowdichia nitida / diplotropis purpurea
Family: Fabaceae
Clade: Angiospermae
Description: Bowdichia nitida (syn. Diplotropis purpurea) is a medium to large evergreen tree native to the Brazilian Cerrado and Amazon. It features large, pinnate leaves, showy clusters of purple, pea-like flowers, and distinctive winged pods. Its durable, high-quality wood is highly valued.
Other Local Names: Cutiuba, Macaniba, Sapupira, Sucupira, Sucupira amarela, Arenillo, Zapan negro, Tatabu, Baaka kiabici, Cœur dehors, Chontaquiro, Huasai-caspi, Zwarte kabbes, Alcornoque, Congrio

Reference Colour: Dark brown
Texture: Medium
Grain: Straight or interlocked
Interlocked Grain: Slight
Notes: Wood dark brown to reddish brown with lighter thin veins.

Diameter: 40÷60cm
Density @12% MC: 910kg/m³
Janka Hardness: 2820lbf
Crushing Strength @12%MC: 88MPa
Static Bending Strength @12%MC: 141MPa
Longitudinal Modulus of Elasticity E: 22.3GPa
Volumetric Shrinkage Coefficient: 0.61% per %
Total Tangential Shrinkage TS: 7%
Total Radial Shrinkage TS: 4.9%
T/R Anisotropy Ratio: 1.4-
Fibre Saturation Point: 24%
Thermal Conductivity: 0.29W/mk
Lower Heating Value: 19490KJ/Kg
Sapwood Thickness: 1÷2cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 2 – durable
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood) Atlas of Tropical Timber Species SUCUPIRA PRETA Cross sections of Diplotropis martiusii
Resistance to Termites: Class D – durable
Treatability: Class 3 – poorly treatable
Use Class Covered by Natural Durability: Class 3 – not in ground contact, outside
Durability Notes: 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: 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: Slight risk

Blunting Effect: Fairly high
Machining Tool: Tungsten carbide
Suitability for Peeling: Not recommended or without interest
Suitability for Slicing: Good
Sawing Machining Notes: Sometimes difficulties with sawing and machining due to interlocked grain. Good finish with filling.
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.
Additional Notes: Wood in high demand for deluxe end uses
End Uses: Turned goods, Interior joinery, Heavy carpentry, Built-in furniture or mobile item, Ship building (planking and deck), House framing, 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, Exterior panelling, Marquetry

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