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: 3
Number of individual trees analyzed: 3
Number of specimens: 7
Number of measurements: 21
Max PZC read (of all measurements): 13.2
Min PZC read (of all measurements): 9.7
Max PZC average on one log: 12.2
Min PZC average on one log: 10.0
PZC Average of all logs: 11.2

Species: goupia glabra
Family: Goupiaceae
Clade: Angiospermae
Description: Goupia glabra is a large, fast-growing evergreen tree native to South American rainforests, characterized by its straight trunk, smooth, flaking bark, glossy green leaves, and small, edible black fruits.
Other Local Names: Cachaceiro, Copiuva, Chaquiro, Saino, Sapino, Kabukalli, Copi, Bois caca, Goupi, Kopie, Capricornia, Kabukalli, Koepi, Congrio blanco

Reference Colour: Yellow brown
Texture: Medium
Grain: Interlocked grain
Interlocked Grain: Marked but not frequent
Notes: Very unpleasant odour when green. Sometimes, presence of internal stresses.

Diameter: 60÷100cm
Density @12% MC: 840kg/m³
Janka Hardness: 1860lbf
Crushing Strength @12%MC: 62MPa
Static Bending Strength @12%MC: 110MPa
Longitudinal Modulus of Elasticity E: 18.19GPa
Volumetric Shrinkage Coefficient: 0.66% per %
Total Tangential Shrinkage TS: 8.8%
Total Radial Shrinkage TS: 5.1%
T/R Anisotropy Ratio: 1.7-
Fibre Saturation Point: 26%
Thermal Conductivity: 0.27W/mk
Lower Heating Value: 19260KJ/Kg
Sapwood Thickness: 3÷8cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 3 – moderately durable
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood)
Resistance to Termites: Class D – durable
Treatability: Class 2 – moderately treatable.
Use Class Covered by Natural Durability: Class 2 – inside or under cover (dampness possible) Atlas of Tropical Timber Species CUPIUBA / KABUKALLI*
Durability Notes: This species is listed in the NF EN 350 standard. Resistance to brown cubical rot: good to very good. Resistance to white rot: moderate.

Log Buoyancy: Does not float
Log Conservation: Moderate (treatment recommended)
Drying Rate: Slow
Drying Risk of Distortion: High risk
Drying Risk of Case Hardening: Yes
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
Sawing Machining Notes: Careful polishing is necessary due to interlocked grain.
Assembly Nailing Screwing: Good but pre-boring necessary
Assembly Notes: Tends to split with nailing. High specific gravity: important that gluing be performed in compliance with the code of practice and instructions for the glue used.
Additional Notes: Its unpleasant odour may limit the use of this timber. For furniture end, uses, filling, and varnishing are necessary
End Uses: Turned goods, House framing, Heavy carpentry, Flooring, Stairs (inside), Industrial or heavy flooring, Exterior joinery, Sliced veneer, Built-in furniture or mobile item, Exterior panelling

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