Herkimer Diamond


Cell Phone Users
Please Scroll Down
or Turn Sideways

Order securely with PayPal
Note: Paypal cart will open a new browser tab.

Sign up for Announcements!
Sign up for Announcements

Be the first to know when new crystals are added to the web site.

You will need to confirm your subscription by replying to a verification email that will be sent to your in box after you sign up for Announcements.

Please note:
  • Announcements, and other mail from us, may filter to the Junk or Spam mail folder. If this should occur, mark the message as "not Spam" and add us to your contacts list.
  • It is the aggressive nature of the spam filters in the email programs that sometimes mark legitimate mail as spam.

Your privacy is important to us.
Email addresses are never shared, nor is any personal information ever collected.

Copyright HerkimerCrystalsOnline.com


Rare double terminated quartz crystal

Elusive rainbow flashes

Large Herkimer crystal

Photo captured a window facet
Many more photos below



Atypical AA Grade Quartz Crystal

Length: 21.75 mm
Width: 15 mm 
Depth: 12 mm 
Weight: 20.93 ct. / 4.1 g 

At over 20 ct., this is a large Herkimer Diamond. Our grading process finds less than 5% of Herkimer's mined are AA grade quality. Of these 5 in 100 natural gemstones, maybe 1 or 2 is 12 mm (1/2") or larger. Anything over 20 mm is very rare. Grading remains a very subjective yet important process when considering Herkimer Diamond quality. There is sometimes a fine line between each of the grades. When determining AA and A grades, size is an important consideration. Please rely on the photographs and descriptions of our Herkimer Diamonds to make your buying decisions; and be confident in knowing the descriptions of the crystals for sale are accurate and sincere.
Externally there is  a shallow, geometric key mark on one facet.  Also, a divot, likely caused by a hydro popping, covers another facet.
Internally it's eye clean and water clear!  With a loupe 2 teeny bubble are all that's inside.
This is a large, fantastic AA grade Herkimer Diamond!

Price: US$ 225.00
Order via Paypal: *SOLD*

Order via Email

Like It? Save it to your Pinterest board !




Large AA grade Herkimer Diamond
Gorgeous Herkimer gemstone

External divot reflected in picture

Excellent clarity shows here.

Crystal measures 21.75x15 mm

Photo shows sharp double termination points.

Natural quartz crystal with a bright shine!

Large Herkimer Diamond



AA Crystals | A Crystals | Atypical | B Crystals | C Crystals | D Crystals | Matrix | Machine Cut Jewelry | Natural Herkimer Jewelry | Machine Faceted Herkimer's | Order Info | Home | Email | About Us