Can this be used to tumble glass to make sea glass?

Yes! I have a spot where I find lots of shards of glass and rare colors but they just aren’t “cooked” enough. I got the tumbler to finish them. The glass I have is real sea glass not fake nor bottles I break (which I have never done and won’t because I like that I find my glass and know it has a story from whence it came!) I have found it along beaches and rivers but it just needed some extra time to be perfect but because of the color rarity I wasn’t going to toss it back!

Where can I buy more grit?

Amazon (there are alternatives if you want to search for a specific one you need: coarse (60/90 grit), medium (150/220 grit), fine (500 grit), rock polish (TXP aluminum oxide) but below are two choices that will contain all you’d need, are approx the same lbs of material, and will work equally well): https://www.amazon.com/dp/B01MRKI4W0/ref=cm_sw_r_cp_api_i_8luBDbAX0440H https://www.amazon.com/dp/B07PYFGT44/ref=cm_sw_r_cp_api_i_SkuBDbZFZBTVW

How many pounds/ounces of rocks can you put into the barrel with grit for tumbling?

The Rock Tumbler can hold 1lb (16oz) of rocks in the barrel with the grit for tumbling.Thank you for your inquiry!

How long does it take from start to finish? And can you use any rocks or only the ones that come with it

Each grade of sand is a different grit. About 3 weeks and one extra week to polish. You can run any rocks even ones that you find.

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National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Tumbling Kit with Rocks & Crystals (Amazon Exclusive)

Product ID: 34394992

Details

Age Range (Description)
8 years and up
Brand
Blue Marble
Color
Multicolor
Item dimensions L x W x H
10.98 x 5.2 x
Theme
Geology

💎4-stage silicon carbide polishing grit

🔒Leak-proof rubber-lined barrel

⚙️Powerful durable motor

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Description

💎 Polish your passion, rock your style!

BUILT TO ENDURE - Durable motor and leak-proof barrel ensure years of smooth tumbling.
AWARD WINNING QUALITY - From the Toy Association’s Toy of the Year winner, backed by expert U.S. support.
STEM MEETS CREATIVITY - Detailed learning guide blends science education with hands-on fun for all ages 8+.
ALL INCLUSIVE STARTER KIT - Includes ½ lb of 9 unique gemstones plus jewelry fastenings to create wearable art.
EFFORTLESS GEMSTONE TRANSFORMATION - Turn rough rocks into dazzling polished gems with ease.

The National Geographic Starter Rock Tumbler Kit is a complete, durable, and leak-proof rock polishing system designed for beginners and hobbyists. It includes a powerful motor, a rubber-lined barrel, ½ pound of assorted rough stones featuring nine gemstone types, four stages of silicon carbide grit for professional-grade polishing, and five jewelry fastenings to craft unique accessories. Perfect for STEM learning and creative expression, this award-winning kit offers an immersive geology experience for ages 8 and up.

Specifications

ASIN	B01I56RV0C
Additional Features	Leak Proof
Age Range Description	8 years and up
Art Craft Kit Type	Rock Polishing
Best Sellers Rank	#12,551 in Toys & Games ( See Top 100 in Toys & Games ) #6 in Kids' Rock Tumblers
Brand Name	Blue Marble
Color	Multicolor
Customer Reviews	4.3 4.3 out of 5 stars (11,086)
Global Trade Identification Number	00816448020391
Included Components	5 Jewelry Fastenings, Four Levels of Grit, Leak-proof, Rubber-lined Tumbler Barrel, Rock Tumbler, ½ Pound of Stones
Item Dimensions	10.98 x 5.2 x 12 inches
Item Type Name	Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity
Item Weight	1.9 Kilograms
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGTUMBLER2
Material Type	Rubber
Model Name	Complete Rock Tumbling Hobby Kit
Model Number	NGTUMBLER2
Number of Pieces	30
Product Style	Modern
Set Name	Necklace, Key chain, Ring, Two clip-on earring fastenings
Size	1 Count (Pack of 1)
Subject Character	Rock Tumbling, Gemstones
Theme	Geology
UPC	816448020391
Unit Count	1.0 Count
Warranty Description	We're proud to make the highest quality products which are backed by exceptional service.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 99.77

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In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

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