DiamondCore Tools
- Website
- https://diamondcoretools.com/
- Location
- 680 W. Bradley Ave., El Cajon, CA 92020; phone (619) 905-9400; retail lobby Mon–Thu 10 am–4 pm, Fri 9 am–noon
- Last checked
- 2026-10-23
DiamondCore Tools is a pottery tool manufacturer and supplier in El Cajon, California with its own online store and cart, selling its carving, trimming, sanding and extruder tools, the Cink clay-water recycling sink, and clay and glazes.
Official shop URL: https://diamondcoretools.com/collections/clay-extruders (company home: https://diamondcoretools.com/)
Last checked: 2026-10-23
Category: Supplier Also called: DiamondCore® Tools; DCT; diamondcoretools.com
Who it’s for
Potters, ceramics teachers and studios who want specialty hand tools, studio clean-up equipment and glazes shipped, and anyone near San Diego who wants to shop in person.
Why it’s listed
This is the company’s own store, with list prices, stock status, variant selectors and a cart and checkout. It prints a street address, phone and lobby hours. It is not a marketplace or directory card.
- Our Story page (checked 2026-10-23): “At DiamondCore® Tools, we’ve been on a mission to change the world of ceramic arts since 1996. We create and manufacture innovative, high-quality, hand-crafted tools.” Product lines include carving, diamond stylus and trimming tools, handheld clay extruders, diamond sanding pads and grinding discs, rotary tools and bats.
- Clay Extruders collection: R-series handheld clay extruders such as the R4 Concave Handheld Clay Extruder at $48.00, in stock in Striped Wood on the check date.
- Needle Tool (product page): extendable coated stainless-steel needle on a hardwood handle, $26.00, in stock, “Ships from California.” Buying 3 or more wood-handled tools takes 10% off at checkout.
- The Cink collection: the Cink 2 mobile clay-water recycling system at $3,850 and the Mini Cink Cleanup Station at $698, both available on the check date. A site banner offered free domestic shipping on Cinks through October 31.
- Retail Lobby Hours page: the El Cajon headquarters, “about 25 minutes from downtown San Diego,” sells DiamondCore tools, clay and glazes in person, with 2026 holiday closures listed.
Official URL
Home: https://diamondcoretools.com/
Shop (Clay Extruders): https://diamondcoretools.com/collections/clay-extruders
R4 extruder: https://diamondcoretools.com/products/r4-concave-handheld-clay-extruder
Needle Tool: https://diamondcoretools.com/products/needle-tool
The Cink: https://diamondcoretools.com/collections/the-cink
Our Story: https://diamondcoretools.com/pages/our-story
Contact: https://diamondcoretools.com/pages/contact-us
Retail Lobby Hours: https://diamondcoretools.com/pages/retail-lobby-hours
(First-party store checked 2026-10-23. Every cited URL returned HTTP 200 to curl -sL -m 30 with a Chrome User-Agent and browser Accept headers, spaced 3 seconds apart. Nothing was added to a cart or bought.)
Location
680 W. Bradley Ave., El Cajon, CA 92020. Phone (619) 905-9400. The Contact page lists lobby access Monday–Thursday 10 am–4 pm and Friday 9 am–noon. The Contact page shows Saturday 9 am–1 pm, but the Retail Lobby Hours page shows Saturday closed, so call before a weekend visit.
This is a supplier. It is not a studio or a guild.
Notes
- Category is Supplier: a manufacturer selling its own tools and equipment, plus glazes, through a first-party cart. No classes or memberships.
- Prices and stock change; the figures above are from the check date.
- California already has several listings. This is a tool maker rather than a clay mixer, so it does not repeat the existing California clay suppliers (checked local files, GitHub main and live clayplaza.com on 2026-10-23; not listed).
- Not affiliated with Clay Plaza. No contact, cart, purchase or form action was taken.
- Image: the Needle Tool product photo (the product page og:image), saved as
diamondcore-tools.png, PNG 1811 × 581.
FAQ
Q: Where is DiamondCore Tools?
A: At 680 W. Bradley Ave., El Cajon, CA 92020, about 25 minutes from downtown San Diego. Phone (619) 905-9400.
Q: Can I buy online?
A: Yes. The company’s own Shopify store has prices, stock status, a cart and checkout, and ships from California.
Q: How much is a handheld clay extruder?
A: R-series handheld clay extruders were $48.00 each on the check date.
Q: What is the Cink?
A: A clay-water recycling and clean-up sink for studios. The Cink 2 was $3,850 and the Mini Cink $698 on the check date.
Q: Can I shop in person?
A: Yes. The El Cajon retail lobby sells tools, clay and glazes, generally Monday–Thursday 10 am–4 pm and Friday 9 am–noon.