Steampunkers USA Power Pack Series - 30mm Triquetra Celtic Knot Indian Tree Agate Green- 20" to 24" Adjustable Black Poly Washable Cord - Trinity Triangle Crystal Smelt Gemstone Collectibles Stone Type: Indian Agate. Stone Color: Green Purple Clear. Pendant Dimensions: 1.4" Diameter, 0.20" Thick. Pendant Metric: 30mm x 30mm x 5mm. Description: Celtic Trinity Knot (Triquetra) Triangle Gemstone Pendant Necklace. Gemstone Symbology: Agate  Health, Protection, and Luck June's Birthstone (Traditional) September's Birthstone (Historical) Gemini Birthstone (May 21st  June 20th) Includes Adjustable 20 Black Necklace Cord as Pictured Stones may vary slightly in size, color, pattern, or shape. The item sent to you will be similar to the one pictured first.