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: 2
Number of individual trees analyzed: 2
Number of specimens: 4
Number of measurements: 15
Max PZC read (of all measurements): 17.2
Min PZC read (of all measurements): 11.0
Max PZC average on one log: 16.0
Min PZC average on one log: 12.7
PZC Average of all logs: 14.4

Species: fagara heitzii
Family: Rutaceae
Clade: Angiospermae
Description: Fagara Heitzii (now Zanthoxylum heitzii) is a medium to large African tree characterized by prominent conical thorns on its trunk and branches. It features pinnate, aromatic leaves and produces small, reddish fruits.
Other Local Names: Bongo, M’banza, Olong, Kamasumu

Reference Colour: Light yellow
Texture: Medium
Grain: Straight or interlocked
Interlocked Grain: Slight
Notes: Heartwood light yellow to greenish yellow. Lustrous aspect. Slight ribbon-like aspect on quartersawn.

Diameter: 55÷80cm
Density @12% MC: 520kg/m³
Janka Hardness: 600lbf
Crushing Strength @12%MC: 44MPa
Static Bending Strength @12%MC: 72MPa
Longitudinal Modulus of Elasticity E: 12.41GPa
Volumetric Shrinkage Coefficient: 0.4% per %
Total Tangential Shrinkage TS: 5.7%
Total Radial Shrinkage TS: 3.8%
T/R Anisotropy Ratio: 1.5-
Fibre Saturation Point: 30%
Thermal Conductivity: 0.18W/mk
Sapwood Thickness: 1÷2cm
Sapwood Demarcation: Not clearly demarcated

Resistance to Decay: Class 3 – moderately durable
Resistance to Dry Wood Borers: Class S – susceptible (risk in all the wood)
Resistance to Termites: Class M – moderately durable
Treatability: Class 2-3 – poorly to moderately permeable
Use Class Covered by Natural Durability: Class 2 – inside or under cover (dampness possible) OLON
Durability Notes: This species is listed in the NF EN 350 standard. Prone to blue stain.

Log Buoyancy: Floats
Log Conservation: Moderate (treatment recommended)
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: Normal
Machining Tool: Ordinary
Suitability for Peeling: Good
Suitability for Slicing: Good
Sawing Machining Notes: Some difficulties in planing due to interlocked grain. The silica content can be quite high. Sawdust is an irritant.
Assembly Nailing Screwing: Good
Additional Notes: Olon bark has numerous medical applications
End Uses: Framing, Interior joinery, Formwork, Built-in furniture or mobile item, Boxes and crates, Moulding, Veneer for back or face of plywood, House framing, Veneer for interior of plywood, Blockboard, Panelling, Fibre or particle boards, Glued Laminated, Sliced veneer

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