Ordering Information


To order a mineral, please send me an e-mail at mike@marinmineral.com with the mineral number and a description of the mineral or give me a call at 415-453-0927. Please remember to look at the measurements of the minerals before you buy; some thumbnail sized specimens are shown larger than actual size and some large specimens are pictured smaller than actual size. Minerals will be sold on a first come first served basis. If you are a California resident, a sales tax of 7.75% will be added to your order. Shipping charges will be $5.00 to $10.00 for most domestic orders (more for large packages or overseas shipments). I accept VISA, Mastercard, and checks or money orders in U.S. dollars.

Pay using PayPal:

Make payment to mike@marinmineral.com


Pay by VISA/Mastercard:


I will need the credit card number and expiration date to process the order. You can get me the information 4 ways (1) FAX your VISA or Mastercard information to me at 415-453-1489, (2) call me at 415-453-0927, (3) send the information via a few separate e-mails, or (4) e-mail your phone number and I will call you.

Pay by personal check:

Make checks payable to Mike Keim. Send checks to:

Marin Mineral Company

P.O Box 5256

Larkspur, CA 94977-5256

Return Policy:

I strive to describe the minerals accurately by photos and giving specimen dimensions and pointing out any damage. If upon receipt of the minerals you are not completely satisfied, notify me of your intent to return the mineral within 10 days. I will refund your money (less the cost of shipping; merchant card fees may apply to larger orders) upon receipt of the specimen returned in the same condition .

Thank you,


Mike Keim

Owner/Marin Mineral Company

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For additional information or inquiries please send e-mail

©2004 Marin Mineral Company