3D Printing Info

Filament comparison

PETG-GF vs PLA Stone

Compare printing settings, strength, heat resistance, dated prices and sources.

Glass-fibre polyester (PETG-GF / PET-GF) guideStone-filled PLA guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PETG-GF comparisonsMore PLA Stone comparisons
PETG-GF vs PLA Stone — documented properties and sources
PropertyGlass-fibre polyester (PETG-GF / PET-GF)PETGStone-filled PLAPLA
Market snapshot
Listing priceUSD/kg; dated snapshots$27.38/kg median; $18.99–$29.99/kg across 3 dated product listings$22.99/kg median; $15.99–$49.16/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryGlass-fibre reinforced polyester. Polymaker's Fiberon PET-GF15 uses a PET rather than a PETG matrix and carries 15 wt% glass fibre[1]PLA filled with stone or mineral powder — Formfutura StoneFil declares 40–50 wt% stone powder[2][3]
Densityg/cm³1.43 (Fiberon PET-GF15, ISO 1183)[1]1.22 (Bambu Lab PLA Marble) and 1.50–1.70 (Formfutura StoneFil), ISO 1183[3][2]
Typical priceUSD/kg1 kg spools cluster near 25[4][5]1 kg spools cluster near 21[6][5]
Price range across brandsUSD/kg19–30 across brands; ELEGOO 19, Polymaker Fiberon 30[4][5]16–49 across brands; SUNLU 16, ELEGOO 19, Polymaker 21, Bambu Lab 25, Prusament 38, Filament PM MarbleJet 49 on 0.5 kg spools[4][5][6][7][8][9]
Market availability1–5Niche, a handful of specialist brands[4][5]Stocked by most mainstream brands[6][5][4]
Spool sizes & diameters1.75 mm; 0.5 and 1 kg spools[5]1.75 and 2.85 mm; 0.5 and 1 kg spools plus refills[5][2]
Typical applicationsStiff, dimensionally stable fixtures; the Fiberon grade is designed to be annealed for heat resistance[1]Architectural models, sculpture and props with a matte mineral surface[3]
Printing Parameters
Nozzle temperature°CNot documented190–230 (Bambu Lab)[3]
Bed temperature°CNot documented35–45 (Bambu Lab)[3]
Enclosure / chamber requirement1–5Not documentedOpen frame is fine[3]
Part cooling fanNot documentedFan on[3]
Bed surface & adhesion aidTextured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[10][11]Not documented
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[10][11]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[11]Not documented
Overall printing difficulty1–5Not documentedEasy — minor profile tuning; 0.2 mm nozzles are not usable[12]
Extruder requirementNot documentedNozzles below 0.4 mm are not compatible (Bambu Lab)[12]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Brass acceptable; hardened steel for volume work — Bambu Lab's compatibility table says no hardened nozzle is needed while the note under the same table groups PLA Marble with particle-filled materials that should always use one[12]
Abrasiveness1–5Highly abrasive — standard GF composite[1]Moderately abrasive — stone fill[12][2]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[13]Moderate — needs dry filament and a clean nozzle[12]
Heat-creep / jam sensitivity1–5Slightly sensitive[14]Not documented
Hotend requirementNo special hot-end required[14]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate (0.3–0.8 %) — the PETG matrix reaches 0.40 % saturated at 25 °C / 55 % RH; no glass-filled grade publishes its own figure[10]Moderate — 0.44 % saturated at 25 °C / 55 % RH[3]
Equilibrium moisture content at ~50 % RH%Not documented0.44 saturated at 25 °C / 55 % RH (Bambu Lab)[3]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[15]Not documented
Effect of moisture on strengthPolymaker groups PETG with nylon, PVA and TPU as highly hygroscopic; no dry-versus-conditioned strength figures are published for this grade and the loss shows as bubbling and poor layer adhesion[15]Polymaker rates PLA low-sensitivity and publishes no dry-versus-conditioned figures for this grade; absorbed water flashes to steam and shows as bubbling and poor layer adhesion[15]
Storage requirementSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[15][11]Not documented
Mechanical Properties
Tensile strength (XY)MPa59.9 ± 0.8 printed XY, ISO 527 (Fiberon PET-GF15)[1]33 ± 4 printed XY, ISO 527 (Bambu Lab)[3]
Young's modulusMPa4144 ± 133 printed XY, ISO 527 (Fiberon PET-GF15)[1]2330 ± 240 printed XY, ISO 527 (Bambu Lab)[3]
Elongation at break%4.0 ± 0.5 printed XY, ISO 527 (Fiberon PET-GF15)[1]6.7 ± 0.5 printed XY, ISO 527 (Bambu Lab)[3]
Flexural strengthMPa104.2 ± 2.4 printed XY, ISO 178 (Fiberon PET-GF15)[1]75 ± 5 printed XY, ISO 178 (Bambu Lab)[3]
Flexural modulusMPa3705 ± 85 printed XY, ISO 178 (Fiberon PET-GF15)[1]2920 ± 180 printed XY, ISO 178 (Bambu Lab)[3]
Charpy impact, notchedkJ/m²8.7 ± 0.6 printed XY, ISO 179, notched (Fiberon PET-GF15)[1]9.5 ± 2.6 printed XY, ISO 179, notched (Bambu Lab)[3]
Other impact dataCharpy unnotched 27.2 ± 2.0 printed XY (Fiberon PET-GF15, ISO 179)[1]Charpy unnotched 24.0 printed XY (Bambu Lab, ISO 179)[3]
Layer adhesion / Z tensileMPa48.2 ± 0.3 printed Z, ISO 527 (Fiberon PET-GF15)[1]30 ± 4 printed Z, ISO 527 (Bambu Lab)[3]
Brittleness1–5Brittle — snaps with little warning; elongation 4.0 % in XY and 2.6 % in Z[1]Brittle — snaps with little warning[3]
Creep resistance / sustained load1–5Below average — no GF-grade creep test; the CF grades sagged to 14.8–16.7 mm over 5 days at 1.25 kg against 17.1–20.4 mm unfilled[16][17][18]Poor — no stone-filled creep test; plain printed PLA sagged from 12 to 16.2–21.8 mm over 5 days at 1.25 kg[19][20][21]
Fatigue / repeated-flex resistance1–5Below average — no GF-grade S-N curve; elongation at break falls to 4.0 % in XY against 5.2–9.3 % unfilled[1][22]Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength and the mineral filler leaves a brittle compound[22][3]
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Z strength as % of XY%80 (Fiberon PET-GF15, printed Z against XY tensile)[1]91 by tensile, 73 by flexural (printed, Bambu Lab)[3]
Thermal Properties
HDT at 0.45 MPa°C81.6 as printed, 133.7 after annealing (ISO 75, 0.45 MPa)[1]56 (ISO 75, 0.45 MPa)[3]
HDT at 1.8 MPa°C71.8 as printed, 87.3 after annealing (ISO 75, 1.8 MPa)[1]53 (ISO 75, 1.8 MPa)[3]
Glass transition (Tg)°C59.5 (DSC)[1]56 (DSC)[3]
Melting point / Vicat°C231.6 melting (DSC); Vicat 232.6 (ISO 306)[1]156 peak melt (DSC); Formfutura gives a 120–170 melting range for StoneFil[3][2]
Annealing responseAnnealing lifts HDT at 0.45 MPa from 81.6 to 133.7 °C[1]Not documented
Thermal expansion (CTE)µm/m·K20 along the print bead and 63–74 in the build direction at 30 °C (30 wt% GF, large-format printed, TMA)[23]Not documented
Flammability / UL 94UL 94 HB at 1.5 mm (Fiberon PET-GF15)[1]Not documented
Environment & Chemical
UV resistance1–5Not documentedDegrades within weeks outdoors[24]
Chemical resistanceWithstands acids, alkalis, oils and UV exposure[11]Not documented
Food contactNot certified for food contact as filament[11]Not documented
Biodegradability / compostabilityNot biodegradable[11]Not documented
RecyclabilityNot accepted in household plastic collection[11]Not documented
Electrical & ESD propertiesSurface resistivity above 10¹² ohm — insulating (Fiberon PET-GF15, ANSI/ESD S11.11)[1]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[25]Low hazard — minimal VOC and particle emission[25]
Ventilation / filtration requirement1–5Open a window / occasional ventilation[25]None needed in a normal room[25]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Formfutura's SDS sets an occupational limit of 1 mg/m³ for the stone powder and lists it as both a fibre and a particulate — do not dry-sand without extraction[2]
Post-Processing
Sanding & machiningSands poorly — the material is tough and gums rather than powders[14]Sands to a stone-like matte surface[2]
Gluing & solvent weldingCyanoacrylate; no common solvent welds PETG cleanly[14]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[14]Not documented
Support material pairingPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[14]Support for PLA (Bambu Lab)[3]
Dimensional accuracy & detailNot documentedMatte mineral surface hides layer lines; 55° overhangs and 30 mm bridges as for plain PLA[3]
Solvents & Solubility
Soluble inNo common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[26][27]Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[28]
Softened or crazed byAcetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[26]Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[28][27]
Solvent welding & smoothing agentDichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[27]Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[29][27]

Material entries describe families or representative grades, not an interchangeable specification for every spool. Test methods, orientations and conditions may differ. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.

Sources for this comparison

  1. Fiberon PET-GF15 Technical Data Sheet V1.0 Polymaker · 2026-08 · tds
  2. StoneFil safety data sheet Formfutura · 2026-08 · msds
  3. Bambu Filament Technical Data Sheet — PLA Marble Bambu Lab · 2026-08 · tds
  4. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  5. Polymaker product catalogue Polymaker · 2026-08 · vendor
  6. PLA Marble — product page Bambu Lab US Store · 2026-08 · vendor
  7. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  8. SUNLU High Speed PLA Marble 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  9. Filament PM PLA MarbleJet technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  10. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  11. PETG — material basics Polymaker Wiki · 2026-08 · doc
  12. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  13. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  14. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  15. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  16. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  17. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  18. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  19. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  20. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  21. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  22. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  23. Effects of Fiber Orientation on the Coefficient of Thermal Expansion of Fiber-Filled Polymer Systems in Large Format Polymer Extrusion-Based Additive Manufacturing Materials 15(8):2764 · 2022-04 · paper
  24. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  25. Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-Dimensional Printers with Multiple Filaments (Azimi et al.) Environmental Science & Technology 50(3) 1260-1268 · 2016-01 · paper
  26. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  27. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  28. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  29. Effect of vapour smoothing in trichloromethane on 3D printed PLA — surface, mechanical and chemical structure Pitale, Keche & Chopra, Engineering Research Express 6(4) 045579 · 2024-12 · paper