Kokomo Opalescent Glass

What Kokomo Opalescent Glass does

Kokomo Opalescent Glass Co. (KOG) is a Kokomo, Indiana-based manufacturer and retailer of hand-crafted art glass, founded in 1888 as Opalescent Glass Works by Charles Edward Henry and renamed to its current form on January 13, 1912. The company operates the oldest continuously running hand cast art glass factory in the United States, producing sheet glass (Cathedral, Opalume, Opalescent Combination, Streaky, Single Color, Multi-Colored, Catspaw, Dichroic, Iridized, Heads, and Limited Runs), rondels and bullseyes (Spun and Blown), dalle de verre, jewels, chunk glass, and custom fabricated items including lighting, vessel sinks, countertops, and laminated panels. KOG serves hobbyists and DIY enthusiasts, professional stained-glass studios, wholesale distributors, architects and contractors, interior designers, restoration specialists, and consumers of finished gift, memorial, and award products.

KOG's core manufacturing technology rests on hand-cranked tables and traditional techniques dating to 1888, with hundreds of proprietary color recipes, textures, and densities developed and documented in-house. The company continues to operate the original tables used to supply Louis Comfort Tiffany, and it remains a principal source for Tiffany-reproduction glass and historic restoration matching. Fusible glass products are formulated to a published coefficient of expansion (COE 92-94) with documented firing schedules for fusing and kiln work. Standard sheet glass is priced at approximately $31.87-$117.07 per sheet, blown and spun rondels at approximately $29.87-$471.62, standard 8"x12" dalle de verre at $50.72-$70.72, and pressed jewels at approximately $11.00-$21.84, with samples, chunk glass, and tools offered as add-ons.

Revenue is generated across nine streams: art glass product sales, wholesale distribution, custom fabrication, restoration and repair, awards and engraving, memorial products (including ash-infused urns and jewelry), classes and workshops ($103-$230 per seat), factory tours ($6 adults/$3 students), and gift wrapping. Distribution combines a global e-commerce storefront on kog.com with multi-currency support (USD, EUR, GBP, CAD), a retail Op Shop at 1310 South Market Street in Kokomo, dedicated wholesale teams for distributors, professional studios, and contractor/architect accounts, direct field sales for interior design and custom projects, and international shipping to most countries. The company is privately held, with reported continuity in ownership tied to descendants of local businessmen who acquired the firm in June 1891 (Peter Hoss, William Blacklidge, and John Learner); no venture capital, private equity, or parent-company backing is disclosed in the available data.

Name

Kokomo Opalescent Glass

Legal name

Kokomo Opalescent Glass Co.

Website

https://kog.com

Company type

Private

Founded year

1888

Operating status

Operating

Headcount range

11–50 employees

Short description

Kokomo Opalescent Glass Co., founded in 1888, is a privately held Kokomo, Indiana manufacturer and retailer of hand-crafted art glass, serving hobbyists, stained-glass studios, architects, interior designers, and restoration specialists worldwide through e-commerce, wholesale, retail, and custom fabrication channels.

Ownership category

akta.pro rank

Product category

Art Glass Manufacturing

NAICS

Other Pressed and Blown Glass and Glassware Manufacturing (327212)

SIC

Glass & Glassware, Pressed Or Blown (3220)

akta.pro primary industry

Specialty & Decorative Glass Packaging (Custom Shapes, Embossed, Premium) (IMALAEAE)

Keywords

• Hand cast art glass
• Stained glass supplies
• Opalescent glass production
• Custom glass fabrication
• Glass restoration services

Headquarters

HQ city

Kokomo

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Others

Revenue model

1. Art Glass Product Sales: Sale of hand-crafted art glass products including sheet glass, rondels, bullseyes, dalle de verre, jewels, chunk glass, and specialty items. Products sold at various price points from samples to premium pieces.
2. Wholesale Distribution: Bulk sales to distributors, professional studios, contractors, and architects. Separate pricing tiers and account management for wholesale customers.
3. Custom Fabrication Services: Custom glass cutting (straight cuts, circles, shapes), custom windows and panels, lamination, countertops, lighting fixtures, and vessel sinks. Handmade to order.
4. Restoration & Repair Services: Stained glass restoration, art glass repair, and custom glass matching services for existing pieces including Tiffany-style work.
5. Awards & Engraving: Custom cast awards, plaques, and recognition pieces with sandblasted logos, wording, or photos. Both custom and standard designs available.
6. Memorial Products: Hand-blown urns, memorial plaques, and paperweights incorporating loved ones' ashes. Custom handmade to order.
7. Glass Classes & Workshops: On-site educational classes teaching stained glass techniques, bead making, mosaics, kaleidoscope building, and other glass arts. Classes priced at $103-$206.
8. Factory Tours: Guided tours of the manufacturing facility showcasing traditional glass-making techniques. Adults $6, Students $3.
9. Gift Wrapping: Optional gift wrapping and packaging service for purchases.

Pricing tiers

Go-to-market motion4 records

Distribution channels7 records

Marketing channels6 records

Core offering

Kokomo Opalescent Glass manufactures and sells hand-crafted art glass products made using traditional methods dating to 1888. Core offerings include sheet glass in multiple varieties, rondels and bullseyes, dalle de verre, pressed jewels, chunk glass, custom-fabricated lighting and architectural pieces, awards and engraving, memorial products, and gift items. The company also provides stained glass restoration services, custom glass matching, educational classes, and guided factory tours from its Kokomo, Indiana facility.

Product overview

Kokomo Opalescent Glass Co. operates as a manufacturer and retailer of hand-crafted art glass products, founded in 1888. The company offers a diverse portfolio organized into product categories for hobbyists, wholesale customers, interior design professionals, and restoration services. Core products include Sheet Glass in multiple varieties (Cathedral, Opalume, Opalescent Combination, Streaky, Dichroic, etc.), Rondels & Bullseyes, Dalle de Verre, Jewels, and Chunk Glass. The company also provides finished goods including Lighting (pendant lights, exterior lighting), Awards & Engraving, Memorial Products, and Gifts (suncatchers, blown glass, jewelry, candles, panels). Service offerings encompass Interior Design (custom windows, countertops, sinks), Restoration & Repairs, educational Classes, and Factory Tours. The company operates on a B2C e-commerce platform with separate wholesale channels and maintains operations at their Kokomo, Indiana facility.

Differentiator

Problem solved

Functional benefit

Products and services

• Sheet Glass Hand-crafted art glass available in multiple varieties including Cathedral, Opalume, Opalescent Combination, Streaky Combination, Single Color, Multi-Colored, Catspaw, Dichroic, Heads, Iridized, Limited Runs, and Variety Packs, sold in various textures and densities for stained glass, fusing, and mosaic work.
• Sheet Glass Samples

Named customers3 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered minor and core.

• Exposition Universelle (Paris, France)minorStrategic or Co-development Partner · 1 January 1889KOG sent 30 sheets of opalescent glass to the 1889 Exposition Universelle in Paris. Despite 16 sheets being broken during transport, the remaining 14 were sufficient for Henry to win a gold medal, bringing international recognition and orders.
• Louis Comfort TiffanycoreStrategic or Co-development Partner · 1 January 1888Louis Comfort Tiffany was a key early customer and collaborator. From November 16, 1888, KOG began supplying Tiffany with custom colored opalescent glass. Tiffany preferred the imperfections in opalescent glass for creating unique art glass styles. In 1893 alone, Tiffany purchased over 10,000 pounds of glass. KOG continues to produce reproductions on the original tables used for Tiffany and remains the main source for Tiffany reproductions and restorations.
• Edison General ElectricminorStrategic or Co-development Partner · 1 January 1888Early customer for electric insulators and sheet glass production. The company's original product line included electric insulators made for Edison General Electric, alongside sheet glass production.
• Stelz Studios (Steve Stelz)minorStrategic or Co-development PartnerFeatured poster artist who designed and executed the Rhododendron poster sold by KOG. Located in Flemington, NJ.
• Savoy Studios (Daniel Head)minorStrategic or Co-development PartnerGlass artist who fabricated the Bricolage poster design for KOG. Located in Portland, OR.
• Bogenrief StudiosminorStrategic or Co-development PartnerGlass studio that designed and fabricated the Autumn poster for KOG, with original photography by Jo Van Tuyl. Located in Sutherland, IA.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Uroboros Glass: Portland, Oregon-based art glass manufacturer known for textured, rolled art glass and fusible-compatible products. Direct peer to KOG in the specialty art glass market, particularly for fusing and stained glass applications.
• Spectrum Glass: Manufacturer of art glass for stained glass and fusing, formed from the combination of Uroboros and Spectrum product lines. Direct competitor to KOG in the specialty sheet glass category with overlapping hobbyist and professional customer bases.
• Wissmach Glass Co. West Virginia-based manufacturer of art and architectural glass including cathedral, opalescent, and rolled sheet glass. A direct peer to KOG serving the stained glass hobbyist market with comparable sheet glass products and textures.
• Bullseye Glass Co. Portland, Oregon-based manufacturer of art glass for fusing, stained glass, and kiln-forming with published COE and fusible product lines. Directly comparable to KOG as a specialty art glass manufacturer serving hobbyists, professional studios, and educators with sheet glass and fusible-compatible products.
• Northstar Glassworks: Oregon-based manufacturer of borosilicate and soft glass rods used by flameworkers and lampworkers. Comparable to KOG as a specialty U.S. art glass manufacturer, though focused on hot glass rods rather than sheet glass.
• Armstrong Glass: New Jersey-based manufacturer of art glass including stained glass sheets, rondels, and cast glass items. Direct peer to KOG in the specialty decorative glass market with similar hobbyist and professional customer bases.
• Youghiogheny Glass: Connellsville, Pennsylvania-based manufacturer of art glass including antique, opalescent, and watercolor rolled glass. Direct peer to KOG in the specialty rolled art glass category serving stained glass artists and restoration projects.
• Cascade Glass Works: Portland-based manufacturer of hand-cast art glass including rondels, sheets, and specialty items using traditional methods. Direct peer to KOG in the specialty hand-cast art glass market with overlapping product types and customer segments.

Emerging players

• Reusche & Co. Long-standing supplier of glass colors, enamels, and stains used in stained glass and decoration. Partial overlap with KOG as an adjacent supplier to the same stained glass hobbyist and studio customer base, though focused on consumables rather than glass substrates.

Others

• Ed Hoy's International: U.S. distributor of art glass, stained glass supplies, and fabrication tools. Adjacent to KOG as a channel partner and industry distributor; also offers its own fabrication services, making it both a potential wholesale customer and partial competitor in custom mirror/glass.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/KOGlass
• Xx.com/KOGlass
• LinkedInlinkedin.com/company/kokomo-opalescent-glass-co

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Kokomo Opalescent Glass