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: 1
Number of individual trees analyzed: 17
Number of specimens: 30
Number of measurements: 90
Max PZC read (of all measurements): 13.1
Min PZC read (of all measurements): 7.1
Max PZC average on one log: 12.6
Min PZC average on one log: 7.6
PZC Average of all logs: 9.3

Species: picea excelsa
Family: Pinaceae
Clade: Gymnospermae
Description: Picea Excelsa (Norway Spruce) is a large, fast-growing evergreen conifer with stiff, dark green needles and pendulous brown cones, typically forming a conical shape.
Other Local Names: Fichte, Épicéa, Abete rosso, Common spruce

Reference Colour: Creamy white
Texture: Fine
Grain: Straight
Interlocked Grain: Absent
Notes: Creamy white wood with sometimes a thin reddish coloured heartwood. Narrow and regular rings on woods coming from cold areas but large and irregular rings on planted trees from other areas. Resin pockets are rather common.

Diameter: 40÷80cm
Density @12% MC: 450kg/m³
Janka Hardness: 660lbf
Crushing Strength @12%MC: 46MPa
Static Bending Strength @12%MC: 78MPa
Longitudinal Modulus of Elasticity E: 11.9GPa
Volumetric Shrinkage Coefficient: 0.39% per %
Total Tangential Shrinkage TS: 8.2%
Total Radial Shrinkage TS: 3.9%
T/R Anisotropy Ratio: 2.1-
Fibre Saturation Point: 33%
Thermal Conductivity: 0.16W/mk
Lower Heating Value: 18520KJ/Kg
Sapwood Demarcation: Not demarcated

Resistance to Decay: Class 4-5 – poorly durable to not durable
Resistance to Dry Wood Borers: Class S – susceptible (risk in all the wood)
Resistance to Termites: Class S – susceptible
Treatability: Class – 3-4 – poorly or not permeable
Use Class Covered by Natural Durability: Class 1 – inside (no risk of dampness)
Durability Notes: This species is listed in the NF EN 350 standard. Common spruce is poorly durable and is used with sapwood (not demarcated). Preservation treatment is therefore imperative.

Log Buoyancy: Not applicable
Log Conservation: Moderate (treatment recommended)
Drying Rate: Rapid
Drying Risk of Distortion: Slight risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: High risk

Blunting Effect: Normal
Sawing Tooth: Ordinary or alloy steel
Machining Tool: Tungsten carbide
Suitability for Peeling: Good
Suitability for Slicing: Good
Sawing Machining Notes: Presence of hard, more or less adhesive, knots.
Assembly Nailing Screwing: Poor
Assembly Notes: Strong tendency to split when nailing. Risk of splitting when nailing.
End Uses: Shingles, Panelling, Coffins, Glued Laminated, Framing, Interior joinery, Heavy carpentry, Moulding, Shipbuilding (mast), House framing, Boxes and crates, Fibre or particle boards, Veneer for back or face of plywood, Poles, Stringed instruments (sounding board), Pulp

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