Slate Monolith SM48 is a large flat rounded boulder bouncing with colour, hand selected from a quarry in South Wales. Our horizontal monoliths are perfect subtle water features for small and medium sized gardens.

Reservoir Pack and LED Lights available in the Basket.


1 in stock

Dimensions600 × 360 × 130 mm



Pembrokeshire Slate


35mm hole for water flow

Our blog contains an extensive guide for how to install a water feature.

Includes a detailed step by step and the recommended accessory products.

Installation Guide

FREE SHIPPING to standard UK postcodes.

Contact for remote area and international shipping quotes.

Contact Us


Delivery is usually within 5 working days, although we can hold stock for short amounts of time (birthday gifts, as one example – buy now and arrange a later delivery). 

Ioan aims to deliver most large pieces in person, although we do use a trusted & insured courier for smaller items, some exceptions and hard to reach locations.

Standard consumer rights apply, although we should highlight that in over 7 years in business we are yet to have one single product returned.

Delivery & Returns Info

Lighting and Accessory Packs are available in the Basket when purchasing ANY stone water feature.

Accessories for Welsh Slate Water Features


Stunning colourful drilled slate monolith, the photograph shows Slate Monolith SM48 when it is wet. This will dry a slightly lighter colour. Full of stunning natural colours. Delivery can be arranged with our courier, alternatively this can be collected from the workshop, strictly by appointment only. Medium Slate Monoliths of this size and shape are getting increasingly difficult to source. For alternative features in stock please check the online shop. Alternatively, if you’re looking for something very bespoke then please contact us now with your requirements. With over 10 years experience and a portfolio of quarries to choose from, we can find the right natural stone garden feature for you.