Architectural
Mouldings & Surrounds
Compare 97 cast stone mouldings for window heads, jambs, surrounds and facade bands. Choose precast window trim by height, projection and the way it returns at an opening.
A focal point for the arch
Cast Stone Keystones for Arches & Surrounds
Cast stone keystones for arched openings, windows, doors, fireplaces, and decorative wall compositions.
Browse the designs
23 catalogue references
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View in 3D ↓Building the 3D material study…
Live WebGL geometryKST-10 · Catalogue-based keystone reconstructionKST-10
Back to the designs ↑Drag to orbit · use Front, Isometric or Side to reset the viewDigital smooth-color studyAlpine White · Smooth
This is KST-10’s individual catalogue-based keystone, not a generic wedge. Front and side outlines retain the published overall dimensions. Ornamental relief, small transitions and undimensioned facet depths are provisional visual interpretations, not exact sculpture scans or fabrication CAD. Confirm physical details, structural role, attachment and color/finish samples before ordering. See all four precast finishes and 19 colors.
Selected reference
KST-10Keystone profiles
Catalogue-based visual study · not fabrication CAD.
Dimensions, drawing & model notes
- Keystone envelope · inches
- 14.75 W × 18 H × 9 maximum depth · published dimensions
- Printed lower dimensions · inches
- 9 width · 5.25 depth · lower layer or partial condition as drawn, not necessarily the overall silhouette at its lowest point
- Catalogue treatment
- raised centre
- Source
- Section KTN1 · PDF page 1 · individual front and side drawings
- Reconstruction notes
- The individual front silhouette and separate side outline are reconstructed from the original vector drawings and calibrated to the printed maximum width, height and depth. Lower width/depth labels are retained separately; they may describe a backing layer or partial condition rather than the whole silhouette. The raised centre and the lower backing/wing layer are distinct source-traced regions, not a flat block with drawn seams. Small shoulder transitions and depth differences follow the separate side layer. Historic drafting discrepancies and undimensioned transition depths require confirmation. These are visual reconstructions, not fabrication CAD or structural/load-bearing approvals. Confirm physical details, dimensions, attachment and color/finish samples before ordering.
Official catalogue drawing · PDF page 1 · Open full dimensions ↗Historic sheet: use current website contact details. Confirm final dimensions and availability with Landmark Stone.- Suitable conversations
- Arched windows · Entry arches · Fireplaces
- Coordinate before release
- Final dimensions, returns, attachment, tolerances, color, and texture.
Project shortlist · 0/3 selected
Save up to three catalogue references to discuss with Landmark Stone.
Catalogue notes & complete model index
Catalogue-based keystone reconstructionsKeystones
23 catalogue / source references · 1 family · four digital color studies
23 individual KST models · 4 original catalogue sheets
Preparing interactive controls. The original catalogue links remain available.
Each reference uses its own front and side drawings, including recessed frames, raised centres, ornamental leaves and scroll profiles. The six ornamental designs are real mesh relief, not flat decals. Carving depths and small undimensioned details are visual estimates, identified below; these are not fabrication CAD or structural approvals.
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Architectural precast23 individual catalogue models · Simple and ornamental forms · Custom sizingCustom profiles welcome
About this catalogue and its source references
Interactive catalogue
Find a reference. Check the official profile.
Explore all 23 KST references as individual catalogue-based 3D models. Inspect their tapered side profiles, recessed frames, sculpted relief and raised centres alongside the original front and side drawings, then shortlist up to three references for your project.
Material programArchitectural precast
ApplicationsArched windows · Entry arches
Catalogue / source references shown23 entries
Project optionsSize · finish · returns
Architectural
Cast Stone Keystones for Arches & Surrounds: profiles, applications and planning.
A keystone concentrates attention at the crown of an arch. The Landmark catalogue ranges from clean tapered blocks to stepped, framed, and ornamental profiles.
Keystones can be selected from the KST series or resized and finished to align with the surrounding arch, sill, moulding, and façade palette.
Landmark Stone is based in Olivehurst, California. Share your project location and drawings for a product review, including projects in Sacramento and across Northern California.
Review precast colors and finishes · Request a precast color and finish sample
Why it works
- 23 individual catalogue models
- Simple and ornamental forms
- Custom sizing
- Coordinated arch surrounds
- Crisp cast geometry
- Interior and exterior use
Applications
Keystones: typical applications.
A starting point for design conversations. Project conditions, engineering, attachment, and local requirements should be reviewed for the final assembly.
01Arched windows
02Entry arches
03Fireplaces
04Garden gates
05Wall niches
06Decorative openings
3 product images
A closer look at Keystones.
Explore product details and relevant project views. Catalogue drawings and alternative systems are identified in the captions. Select any image to see the complete view at a larger size.
From reference to release
What Landmark Stone needs to resolve the piece.
A catalogue code is a useful starting point, not the whole specification. Send the available project information and the team can help close the gaps before fabrication.
Start a Keystones review- 01Drawings & dimensions
Plans, elevations, sections, field measurements, or a marked-up sketch.
- 02Reference & design intent
A catalogue model, inspiration image, or profile that establishes the desired character.
- 03Quantity & configuration
Piece counts, linear footage, corners, radii, returns, openings, and repeated conditions.
- 04Color & surface
Target color, texture, adjacent materials, and the light conditions used for sample approval.
- 05Interface & schedule
Substrate, attachment assumptions, delivery sequence, site access, and required milestone dates.
Common planning questions
Useful answers before you request pricing.
How is a keystone coordinated with an arched surround?
Share the opening geometry, arch radius, surround profile and desired keystone projection. Confirm the selected piece against the complete opening rather than choosing from an isolated image.
Can catalogue references be customized?
Yes. Catalogue families establish proportion and design direction. Final size, length, returns, radius conditions, color, texture, and project interfaces can be reviewed for the selected application.
What should be included with a quote request?
Send the model or design reference, dimensioned drawings when available, quantities, project location, desired finish, and schedule. Early sketches are also welcome when details are still being developed.
How are color and texture approved?
Digital finish studies help narrow the direction, but physical samples should be reviewed beside adjacent materials and in the project’s actual light before final approval.
Are attachment and installation requirements included?
The final assembly depends on piece geometry, substrate, loading, access, and local requirements. These conditions should be coordinated with the project team before release.
Technical review
Planning information in one place.
Open the product catalogue for profile drawings and dimensional references. Confirm final dimensions, tolerances, engineering, finish samples, and installation requirements with the Landmark Stone team.
Downloads
Keystones catalogRelated systems
Continue the material conversation.
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Plan with Keystones
Bring the drawing, inspiration, or field condition.
Tell us what you are designing, building, or renovating. We’ll help identify the right material, finish, details, and next steps.