Crushed rock aggregates produced at the Ronez quarries are supplied direct to the local construction industry, as well as forming the basis for an extensive range of products.

Ronez quarries are grano-diorite deposits, a phaneritic texture intrusive igneous rock similar to granite but containing more plagioclase feldspar than orthoclase feldspar, is from the Pre-Cambrian / Cambrian era and has been worked for construction materials since the eighteenth century. The deposit varies in its composition with sections being granite, areas of both pink and grey, and other sections being dark blue diorite.

Crushed rock aggregates produced at the Ronez quarries are supplied direct to the local market, as well as forming the basis for an extensive range of construction products including ready mixed concrete, asphalt, concrete products, road construction and surfacing, sea defences and drainage.

(J) = Available in Jersey Only

(G) = Available in Guernsey Only

Sub-base Material

Specifications for Highway Works (SHW)​

  • Type 1 (SHW CL803) Granular Sub Base 63mm
  • Type 3 (SHW CL805) Granular Sub Base 63mm

Premium Aggregates

  • 40/75mm Granite Aggregate (G)
  • 0/325mm Granite Aggregate (G)
  • 20/40mm Granite Aggregate
  • 10/20mm Granite Aggregate
  • 4/10mm Granite Aggregate
  • 2/6mm Granite Aggregate
  • 0/75mm Granite Dust (G)
  • 0/20mm Granite Aggregate
  • 0/10mm Granite Aggregate
  • 0/6mm Granite Aggregate
  • 0/4mm Granite Sand
  • 0/4mm Bank Sand


  • 10/63mm Granite Aggregate
  • 5/20mm Granite Aggregate
  • 2/4mm Grit (G)
  • 100/150mm Granite Aggregate

Crushed Rock, Sea Defence and Fill Material

  • 100/150mm Clean Stone Aggregate (J)
  • 100/250mm Gabion Stone Aggregate (J)
  • Rock Armour Stone
  • Random Builders Aggregate (G)

Pipe Bedding

  • 4/10mm Pipe Bedding Granite Aggregate SHW504 (J)
  • 10/20mm Pipe Bedding Granite Aggregate SHW503 (J)

Secondary Aggregates

  • 0/80mm Secondary Aggregate
  • 40/80mm Secondary Aggregate
  • 0/40mm Secondary Hoggin
  • 0/20mm Secondary Hoggin
  • 0/10mm Secondary Fine Hoggin (J)

Recycled Aggregates

  • Road Planings
  • 0/15mm Granite Aggregate (G)
  • 0/40mm Granite Aggregate (G)
  • 40/90mm Granite Aggregate (T3) (G)
  • 0/90mm Granite Aggregate (G)
  • Recycled Granite Aggregate (G)
  • Fine Fill and Tipping Material (G)

Imported and Blended Aggregates

  • 4/10mm Marine Dredged Path Gravel (G)
  • 10/20mm Chard (Flint) Gravel (G)
  • 0/4mm General Purpose Sand (G)
  • 0/20mm General Purpose Sand (G)
  • 0/10mm General Purpose Sand (G)

Bagged Aggregates

  25kg Tote *
2/3mm Granite Aggregate
2/6mm Granite Aggregate
4/10mm Granite Aggregate
10/20mm Granite Aggregate
0/4mm Granite Sand
0/4mm Sharp Washed Sand, Tatchell Stonemason Sand
0/4mm Bank Sand
0/4mm General Purpose Sand (G)
0/2mm Kiln Dried Sand
0/10mm Blended Aggregates (for concrete site mix)
0/20mm Granite Aggregate (G)
0/10mm Granite Aggregate (G)
4/10mm Marine Dredged Path Gravel (G)
20mm Chard Gravel (G)
10/20mm Chard Flint (G)
2/8mm Lightweight Aggregate
Ronez Readybag 9-1 (25kg 0/10 mm Blended Cement Aggregate) (J)   
2EW Silica Sand (J)


* Tote = Approx 900/950kg.