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: 8
Number of individual trees analyzed: 9
Number of specimens: 23
Number of measurements: 69
Max PZC read (of all measurements): 21.5
Min PZC read (of all measurements): 7.4
Max PZC average on one log: 15.3
Min PZC average on one log: 7.6
PZC Average of all logs: 11.2

Species: handroanthus spp.
Family: Bignoniaceae
Clade: Angiospermae
Description: Handroanthus species are deciduous to semi-deciduous trees, renowned for their spectacular, trumpet-shaped flowers (often yellow, pink, or purple) that bloom profusely on bare branches before leaves emerge. They feature palmately compound leaves and yield very hard, durable wood.
Other Local Names: Lapacho, Ipé, Lapacho, Tajibo, Ipê roxo, Pau d’arco, Canaguate, Polvillo, Roble morado, Guayacán, Hakia, Ironwood, Ébène verte, Ipé, Lapacho negro, Ebano verde, Tahuari, Groenhart, Acapro, Araguaney, Puy

Reference Colour: Brown
Texture: Fine
Grain: Interlocked grain
Interlocked Grain: Marked
Notes: Some species have a medium texture. Sometimes yellowish brown to dark olive brown, sometimes with thin veins. Canals contain a greenish yellow deposit (lapachol).

Diameter: 60÷100cm
Density @12% MC: 1040kg/m³
Janka Hardness: 4380lbf
Crushing Strength @12%MC: 95MPa
Static Bending Strength @12%MC: 166MPa
Longitudinal Modulus of Elasticity E: 22.76GPa
Volumetric Shrinkage Coefficient: 0.68% per %
Total Tangential Shrinkage TS: 6.4%
Total Radial Shrinkage TS: 5.1%
T/R Anisotropy Ratio: 1.3-
Fibre Saturation Point: 20%
Thermal Conductivity: 0.33W/mk
Lower Heating Value: 20300KJ/Kg
Sapwood Thickness: 3÷9cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 1 – very durable IPÊ Cross sections of Handroanthus impetiginosa
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
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) due to its high specific gravity and its hardness. 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

Sawing Machining Notes: Sawdust can cause dermatitis. Some difficulties due to interlocked grain.
Assembly Notes: Very high specific gravity: important that gluing be performed in compliance with the code of practice and instructions for the glue used.
Additional Notes: Filling is recommended to obtain a good finish
End Uses: Turned goods, Stakes, Heavy carpentry, Sliced veneer, Ship building (planking and deck), Decking, Cabinetry (high-end furniture), Bridges (parts in contact with water or, Stairs (inside) ground), Vehicle or container flooring, Bridges (parts not in contact with water, or ground), Musical instruments, Poles, Tool handles (resilient woods), Hydraulic works (fresh water), Built-in furniture or mobile item, Hydraulic works (seawater), Moulding, Sleepers, Industrial or heavy flooring

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